Mark most classes as sealed & partial

.github/dev.yml

@@ -1,7 +1,7 @@
 pr: none
 trigger: [ master ]
 
-name: 3.7.2-dev.$(Rev:r)
+name: 4.0.0-dev.$(Rev:r)
 
 pool:
   vmImage: ubuntu-latest

.github/release.yml

@@ -1,7 +1,7 @@
 pr: none
 trigger: none
 
-name: 3.7.$(Rev:r)
+name: 4.0.0
 
 pool:
   vmImage: ubuntu-latest

.gitignore

@@ -3,6 +3,8 @@
 ##
 ## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
 
+launchSettings.json
+
 # User-specific files
 *.rsuser
 *.suo

src/Client.cs

@@ -625,7 +625,7 @@ namespace WTelegram
 			return new RpcResult { req_msg_id = msgId, result = result };
 		}
 
-		class Rpc
+		private sealed class Rpc
 		{
 			internal Type type;
 			internal TaskCompletionSource<object> tcs = new(TaskCreationOptions.RunContinuationsAsynchronously);

src/Encryption.cs

@@ -319,7 +319,7 @@ j4WcDuXc2CTHgH8gFTNhp/Y8/SpDOhvn9QIDAQAB
 		}
 
 #if OBFUSCATION
-		internal class AesCtr(byte[] key, byte[] ivec) : IDisposable
+		internal sealed class AesCtr(byte[] key, byte[] ivec) : IDisposable
 		{
 			readonly ICryptoTransform _encryptor = AesECB.CreateEncryptor(key, null);
 			readonly byte[] _ecount = new byte[16];
@@ -518,7 +518,7 @@ j4WcDuXc2CTHgH8gFTNhp/Y8/SpDOhvn9QIDAQAB
 #endif
 	}
 
-	internal class AES_IGE_Stream : Helpers.IndirectStream
+	internal sealed class AES_IGE_Stream : Helpers.IndirectStream
 	{
 		private readonly ICryptoTransform _aesCrypto;
 		private readonly byte[] _prevBytes;

src/SecretChats.cs

@@ -37,7 +37,7 @@ namespace WTelegram
 		private const int ThresholdPFS = 100;
 		
 		[TLDef(0xFEFEFEFE)]
-		internal class SecretChat : IObject, ISecretChat
+		internal sealed class SecretChat : IObject, ISecretChat
 		{
 			[Flags] public enum Flags : uint { requestChat = 1, renewKey = 2, acceptKey = 4, originator = 8, commitKey = 16 }
 			public Flags flags;

src/Session.cs

@@ -11,7 +11,7 @@ using System.Text.Json;
 
 namespace WTelegram
 {
-	internal class Session : IDisposable
+	internal sealed partial class Session : IDisposable
 	{
 		public int ApiId;
 		public long UserId;
@@ -19,7 +19,7 @@ namespace WTelegram
 		public Dictionary<int, DCSession> DCSessions = [];
 		public TL.DcOption[] DcOptions;
 
-		public class DCSession
+		public sealed class DCSession
 		{
 			public long Id;
 			public long AuthKeyID;
@@ -158,7 +158,7 @@ namespace WTelegram
 		}
 	}
 
-	internal class SessionStore : FileStream // This class is designed to be high-performance and failure-resilient with Writes                  (but when you're Andrei, you can't understand that)
+	internal sealed class SessionStore : FileStream // This class is designed to be high-performance and failure-resilient with Writes                  (but when you're Andrei, you can't understand that)
 	{
 		public override long Length { get; }
 		public override long Position { get => base.Position; set { } }
@@ -192,7 +192,7 @@ namespace WTelegram
 		}
 	}
 
-	internal class ActionStore(byte[] initial, Action<byte[]> save) : MemoryStream(initial ?? [])
+	internal sealed class ActionStore(byte[] initial, Action<byte[]> save) : MemoryStream(initial ?? [])
 	{
 		public override void Write(byte[] buffer, int offset, int count) => save(buffer[offset..(offset + count)]);
 		public override void SetLength(long value) { }

src/TL.Extensions.cs

@@ -11,7 +11,7 @@ namespace TL
 {
 	public static class Extensions
 	{
-		internal class CollectorPeer : Peer
+		internal sealed partial class CollectorPeer : Peer
 		{
 			public override long ID => 0;
 			internal IDictionary<long, User> _users;

src/TL.MTProto.cs

@@ -7,7 +7,7 @@ namespace TL
 {
 	#pragma warning disable IDE1006
 	[TLDef(0x05162463)] //resPQ#05162463 nonce:int128 server_nonce:int128 pq:bytes server_public_key_fingerprints:Vector<long> = ResPQ
-	public class ResPQ : IObject
+	public sealed partial class ResPQ : IObject
 	{
 		public Int128 nonce;
 		public Int128 server_nonce;
@@ -16,7 +16,7 @@ namespace TL
 	}
 
 	[TLDef(0x83C95AEC)] //p_q_inner_data#83c95aec pq:bytes p:bytes q:bytes nonce:int128 server_nonce:int128 new_nonce:int256 = P_Q_inner_data
-	public class PQInnerData : IObject
+	public partial class PQInnerData : IObject
 	{
 		public byte[] pq;
 		public byte[] p;
@@ -26,24 +26,24 @@ namespace TL
 		public Int256 new_nonce;
 	}
 	[TLDef(0xA9F55F95, inheritBefore = true)] //p_q_inner_data_dc#a9f55f95 pq:bytes p:bytes q:bytes nonce:int128 server_nonce:int128 new_nonce:int256 dc:int = P_Q_inner_data
-	public class PQInnerDataDc : PQInnerData
+	public sealed partial class PQInnerDataDc : PQInnerData
 	{
 		public int dc;
 	}
 	[TLDef(0x3C6A84D4, inheritBefore = true)] //p_q_inner_data_temp#3c6a84d4 pq:bytes p:bytes q:bytes nonce:int128 server_nonce:int128 new_nonce:int256 expires_in:int = P_Q_inner_data
-	public class PQInnerDataTemp : PQInnerData
+	public sealed partial class PQInnerDataTemp : PQInnerData
 	{
 		public int expires_in;
 	}
 	[TLDef(0x56FDDF88, inheritBefore = true)] //p_q_inner_data_temp_dc#56fddf88 pq:bytes p:bytes q:bytes nonce:int128 server_nonce:int128 new_nonce:int256 dc:int expires_in:int = P_Q_inner_data
-	public class PQInnerDataTempDc : PQInnerData
+	public sealed partial class PQInnerDataTempDc : PQInnerData
 	{
 		public int dc;
 		public int expires_in;
 	}
 
 	[TLDef(0x75A3F765)] //bind_auth_key_inner#75a3f765 nonce:long temp_auth_key_id:long perm_auth_key_id:long temp_session_id:long expires_at:int = BindAuthKeyInner
-	public class BindAuthKeyInner : IObject
+	public sealed partial class BindAuthKeyInner : IObject
 	{
 		public long nonce;
 		public long temp_auth_key_id;
@@ -52,24 +52,24 @@ namespace TL
 		public DateTime expires_at;
 	}
 
-	public abstract class ServerDHParams : IObject
+	public abstract partial class ServerDHParams : IObject
 	{
 		public Int128 nonce;
 		public Int128 server_nonce;
 	}
 	[TLDef(0x79CB045D, inheritBefore = true)] //server_DH_params_fail#79cb045d nonce:int128 server_nonce:int128 new_nonce_hash:int128 = Server_DH_Params
-	public class ServerDHParamsFail : ServerDHParams
+	public sealed partial class ServerDHParamsFail : ServerDHParams
 	{
 		public Int128 new_nonce_hash;
 	}
 	[TLDef(0xD0E8075C, inheritBefore = true)] //server_DH_params_ok#d0e8075c nonce:int128 server_nonce:int128 encrypted_answer:bytes = Server_DH_Params
-	public class ServerDHParamsOk : ServerDHParams
+	public sealed partial class ServerDHParamsOk : ServerDHParams
 	{
 		public byte[] encrypted_answer;
 	}
 
 	[TLDef(0xB5890DBA)] //server_DH_inner_data#b5890dba nonce:int128 server_nonce:int128 g:int dh_prime:bytes g_a:bytes server_time:int = Server_DH_inner_data
-	public class ServerDHInnerData : IObject
+	public sealed partial class ServerDHInnerData : IObject
 	{
 		public Int128 nonce;
 		public Int128 server_nonce;
@@ -80,7 +80,7 @@ namespace TL
 	}
 
 	[TLDef(0x6643B654)] //client_DH_inner_data#6643b654 nonce:int128 server_nonce:int128 retry_id:long g_b:bytes = Client_DH_Inner_Data
-	public class ClientDHInnerData : IObject
+	public sealed partial class ClientDHInnerData : IObject
 	{
 		public Int128 nonce;
 		public Int128 server_nonce;
@@ -88,23 +88,23 @@ namespace TL
 		public byte[] g_b;
 	}
 
-	public abstract class SetClientDHParamsAnswer : IObject
+	public abstract partial class SetClientDHParamsAnswer : IObject
 	{
 		public Int128 nonce;
 		public Int128 server_nonce;
 	}
 	[TLDef(0x3BCBF734, inheritBefore = true)] //dh_gen_ok#3bcbf734 nonce:int128 server_nonce:int128 new_nonce_hash1:int128 = Set_client_DH_params_answer
-	public class DhGenOk : SetClientDHParamsAnswer
+	public sealed partial class DhGenOk : SetClientDHParamsAnswer
 	{
 		public Int128 new_nonce_hash1;
 	}
 	[TLDef(0x46DC1FB9, inheritBefore = true)] //dh_gen_retry#46dc1fb9 nonce:int128 server_nonce:int128 new_nonce_hash2:int128 = Set_client_DH_params_answer
-	public class DhGenRetry : SetClientDHParamsAnswer
+	public sealed partial class DhGenRetry : SetClientDHParamsAnswer
 	{
 		public Int128 new_nonce_hash2;
 	}
 	[TLDef(0xA69DAE02, inheritBefore = true)] //dh_gen_fail#a69dae02 nonce:int128 server_nonce:int128 new_nonce_hash3:int128 = Set_client_DH_params_answer
-	public class DhGenFail : SetClientDHParamsAnswer
+	public sealed partial class DhGenFail : SetClientDHParamsAnswer
 	{
 		public Int128 new_nonce_hash3;
 	}
@@ -120,52 +120,52 @@ namespace TL
 	}
 
 	[TLDef(0x62D6B459)] //msgs_ack#62d6b459 msg_ids:Vector<long> = MsgsAck
-	public class MsgsAck : IObject
+	public sealed partial class MsgsAck : IObject
 	{
 		public long[] msg_ids;
 	}
 
 	[TLDef(0xA7EFF811)] //bad_msg_notification#a7eff811 bad_msg_id:long bad_msg_seqno:int error_code:int = BadMsgNotification
-	public class BadMsgNotification : IObject
+	public partial class BadMsgNotification : IObject
 	{
 		public long bad_msg_id;
 		public int bad_msg_seqno;
 		public int error_code;
 	}
 	[TLDef(0xEDAB447B, inheritBefore = true)] //bad_server_salt#edab447b bad_msg_id:long bad_msg_seqno:int error_code:int new_server_salt:long = BadMsgNotification
-	public class BadServerSalt : BadMsgNotification
+	public sealed partial class BadServerSalt : BadMsgNotification
 	{
 		public long new_server_salt;
 	}
 
 	[TLDef(0xDA69FB52)] //msgs_state_req#da69fb52 msg_ids:Vector<long> = MsgsStateReq
-	public class MsgsStateReq : IObject
+	public sealed partial class MsgsStateReq : IObject
 	{
 		public long[] msg_ids;
 	}
 
 	[TLDef(0x04DEB57D)] //msgs_state_info#04deb57d req_msg_id:long info:bytes = MsgsStateInfo
-	public class MsgsStateInfo : IObject
+	public sealed partial class MsgsStateInfo : IObject
 	{
 		public long req_msg_id;
 		public byte[] info;
 	}
 
 	[TLDef(0x8CC0D131)] //msgs_all_info#8cc0d131 msg_ids:Vector<long> info:bytes = MsgsAllInfo
-	public class MsgsAllInfo : IObject
+	public sealed partial class MsgsAllInfo : IObject
 	{
 		public long[] msg_ids;
 		public byte[] info;
 	}
 
-	public abstract class MsgDetailedInfoBase : IObject
+	public abstract partial class MsgDetailedInfoBase : IObject
 	{
 		public virtual long AnswerMsgId => default;
 		public virtual int Bytes => default;
 		public virtual int Status => default;
 	}
 	[TLDef(0x276D3EC6)] //msg_detailed_info#276d3ec6 msg_id:long answer_msg_id:long bytes:int status:int = MsgDetailedInfo
-	public class MsgDetailedInfo : MsgDetailedInfoBase
+	public sealed partial class MsgDetailedInfo : MsgDetailedInfoBase
 	{
 		public long msg_id;
 		public long answer_msg_id;
@@ -177,7 +177,7 @@ namespace TL
 		public override int Status => status;
 	}
 	[TLDef(0x809DB6DF)] //msg_new_detailed_info#809db6df answer_msg_id:long bytes:int status:int = MsgDetailedInfo
-	public class MsgNewDetailedInfo : MsgDetailedInfoBase
+	public sealed partial class MsgNewDetailedInfo : MsgDetailedInfoBase
 	{
 		public long answer_msg_id;
 		public int bytes;
@@ -189,25 +189,25 @@ namespace TL
 	}
 
 	[TLDef(0x7D861A08)] //msg_resend_req#7d861a08 msg_ids:Vector<long> = MsgResendReq
-	public class MsgResendReq : IObject
+	public sealed partial class MsgResendReq : IObject
 	{
 		public long[] msg_ids;
 	}
 
 	[TLDef(0x2144CA19)] //rpc_error#2144ca19 error_code:int error_message:string = RpcError
-	public class RpcError : IObject
+	public sealed partial class RpcError : IObject
 	{
 		public int error_code;
 		public string error_message;
 	}
 
-	public abstract class RpcDropAnswer : IObject { }
+	public abstract partial class RpcDropAnswer : IObject { }
 	[TLDef(0x5E2AD36E)] //rpc_answer_unknown#5e2ad36e = RpcDropAnswer
-	public class RpcAnswerUnknown : RpcDropAnswer { }
+	public sealed partial class RpcAnswerUnknown : RpcDropAnswer { }
 	[TLDef(0xCD78E586)] //rpc_answer_dropped_running#cd78e586 = RpcDropAnswer
-	public class RpcAnswerDroppedRunning : RpcDropAnswer { }
+	public sealed partial class RpcAnswerDroppedRunning : RpcDropAnswer { }
 	[TLDef(0xA43AD8B7)] //rpc_answer_dropped#a43ad8b7 msg_id:long seq_no:int bytes:int = RpcDropAnswer
-	public class RpcAnswerDropped : RpcDropAnswer
+	public sealed partial class RpcAnswerDropped : RpcDropAnswer
 	{
 		public long msg_id;
 		public int seq_no;
@@ -215,7 +215,7 @@ namespace TL
 	}
 
 	[TLDef(0x0949D9DC)] //future_salt#0949d9dc valid_since:int valid_until:int salt:long = FutureSalt
-	public class FutureSalt : IObject
+	public sealed partial class FutureSalt : IObject
 	{
 		public DateTime valid_since;
 		public DateTime valid_until;
@@ -223,7 +223,7 @@ namespace TL
 	}
 
 	[TLDef(0xAE500895)] //future_salts#ae500895 req_msg_id:long now:int salts:vector<future_salt> = FutureSalts
-	public class FutureSalts : IObject
+	public sealed partial class FutureSalts : IObject
 	{
 		public long req_msg_id;
 		public DateTime now;
@@ -231,24 +231,24 @@ namespace TL
 	}
 
 	[TLDef(0x347773C5)] //pong#347773c5 msg_id:long ping_id:long = Pong
-	public class Pong : IObject
+	public sealed partial class Pong : IObject
 	{
 		public long msg_id;
 		public long ping_id;
 	}
 
-	public abstract class DestroySessionRes : IObject
+	public abstract partial class DestroySessionRes : IObject
 	{
 		public long session_id;
 	}
 	[TLDef(0xE22045FC)] //destroy_session_ok#e22045fc session_id:long = DestroySessionRes
-	public class DestroySessionOk : DestroySessionRes { }
+	public sealed partial class DestroySessionOk : DestroySessionRes { }
 	[TLDef(0x62D350C9)] //destroy_session_none#62d350c9 session_id:long = DestroySessionRes
-	public class DestroySessionNone : DestroySessionRes { }
+	public sealed partial class DestroySessionNone : DestroySessionRes { }
 
-	public abstract class NewSession : IObject { }
+	public abstract partial class NewSession : IObject { }
 	[TLDef(0x9EC20908)] //new_session_created#9ec20908 first_msg_id:long unique_id:long server_salt:long = NewSession
-	public class NewSessionCreated : NewSession
+	public sealed partial class NewSessionCreated : NewSession
 	{
 		public long first_msg_id;
 		public long unique_id;
@@ -256,7 +256,7 @@ namespace TL
 	}
 
 	[TLDef(0x9299359F)] //http_wait#9299359f max_delay:int wait_after:int max_wait:int = HttpWait
-	public class HttpWait : IObject
+	public sealed partial class HttpWait : IObject
 	{
 		public int max_delay;
 		public int wait_after;
@@ -264,19 +264,19 @@ namespace TL
 	}
 
 	[TLDef(0xD433AD73)] //ipPort#d433ad73 ipv4:int port:int = IpPort
-	public class IpPort : IObject
+	public partial class IpPort : IObject
 	{
 		public int ipv4;
 		public int port;
 	}
 	[TLDef(0x37982646, inheritBefore = true)] //ipPortSecret#37982646 ipv4:int port:int secret:bytes = IpPort
-	public class IpPortSecret : IpPort
+	public sealed partial class IpPortSecret : IpPort
 	{
 		public byte[] secret;
 	}
 
 	[TLDef(0x4679B65F)] //accessPointRule#4679b65f phone_prefix_rules:bytes dc_id:int ips:vector<IpPort> = AccessPointRule
-	public class AccessPointRule : IObject
+	public sealed partial class AccessPointRule : IObject
 	{
 		public byte[] phone_prefix_rules;
 		public int dc_id;
@@ -284,7 +284,7 @@ namespace TL
 	}
 
 	[TLDef(0x5A592A6C)] //help.configSimple#5a592a6c date:int expires:int rules:vector<AccessPointRule> = help.ConfigSimple
-	public class Help_ConfigSimple : IObject
+	public sealed partial class Help_ConfigSimple : IObject
 	{
 		public DateTime date;
 		public DateTime expires;
@@ -368,19 +368,19 @@ namespace TL.Methods
 {
 	#pragma warning disable IDE1006
 	[TLDef(0x60469778)] //req_pq#60469778 nonce:int128 = ResPQ
-	public class ReqPq : IMethod<ResPQ>
+	public sealed partial class ReqPq : IMethod<ResPQ>
 	{
 		public Int128 nonce;
 	}
 
 	[TLDef(0xBE7E8EF1)] //req_pq_multi#be7e8ef1 nonce:int128 = ResPQ
-	public class ReqPqMulti : IMethod<ResPQ>
+	public sealed partial class ReqPqMulti : IMethod<ResPQ>
 	{
 		public Int128 nonce;
 	}
 
 	[TLDef(0xD712E4BE)] //req_DH_params#d712e4be nonce:int128 server_nonce:int128 p:bytes q:bytes public_key_fingerprint:long encrypted_data:bytes = Server_DH_Params
-	public class ReqDHParams : IMethod<ServerDHParams>
+	public sealed partial class ReqDHParams : IMethod<ServerDHParams>
 	{
 		public Int128 nonce;
 		public Int128 server_nonce;
@@ -391,7 +391,7 @@ namespace TL.Methods
 	}
 
 	[TLDef(0xF5045F1F)] //set_client_DH_params#f5045f1f nonce:int128 server_nonce:int128 encrypted_data:bytes = Set_client_DH_params_answer
-	public class SetClientDHParams : IMethod<SetClientDHParamsAnswer>
+	public sealed partial class SetClientDHParams : IMethod<SetClientDHParamsAnswer>
 	{
 		public Int128 nonce;
 		public Int128 server_nonce;
@@ -399,35 +399,35 @@ namespace TL.Methods
 	}
 
 	[TLDef(0xD1435160)] //destroy_auth_key#d1435160 = DestroyAuthKeyRes
-	public class DestroyAuthKey : IMethod<DestroyAuthKeyRes> { }
+	public sealed partial class DestroyAuthKey : IMethod<DestroyAuthKeyRes> { }
 
 	[TLDef(0x58E4A740)] //rpc_drop_answer#58e4a740 req_msg_id:long = RpcDropAnswer
-	public class RpcDropAnswer : IMethod<TL.RpcDropAnswer>
+	public sealed partial class RpcDropAnswer : IMethod<TL.RpcDropAnswer>
 	{
 		public long req_msg_id;
 	}
 
 	[TLDef(0xB921BD04)] //get_future_salts#b921bd04 num:int = FutureSalts
-	public class GetFutureSalts : IMethod<FutureSalts>
+	public sealed partial class GetFutureSalts : IMethod<FutureSalts>
 	{
 		public int num;
 	}
 
 	[TLDef(0x7ABE77EC)] //ping#7abe77ec ping_id:long = Pong
-	public class Ping : IMethod<Pong>
+	public sealed partial class Ping : IMethod<Pong>
 	{
 		public long ping_id;
 	}
 
 	[TLDef(0xF3427B8C)] //ping_delay_disconnect#f3427b8c ping_id:long disconnect_delay:int = Pong
-	public class PingDelayDisconnect : IMethod<Pong>
+	public sealed partial class PingDelayDisconnect : IMethod<Pong>
 	{
 		public long ping_id;
 		public int disconnect_delay;
 	}
 
 	[TLDef(0xE7512126)] //destroy_session#e7512126 session_id:long = DestroySessionRes
-	public class DestroySession : IMethod<DestroySessionRes>
+	public sealed partial class DestroySession : IMethod<DestroySessionRes>
 	{
 		public long session_id;
 	}

src/TL.Secret.cs

@@ -4,7 +4,7 @@ namespace TL
 {
 	#pragma warning disable IDE1006
 	/// <summary>Object describes the contents of an encrypted message.		<para>See <a href="https://corefork.telegram.org/type/DecryptedMessage"/></para></summary>
-	public abstract class DecryptedMessageBase : IObject
+	public abstract partial class DecryptedMessageBase : IObject
 	{
 		/// <summary>Flags, see <a href="https://corefork.telegram.org/mtproto/TL-combinators#conditional-fields">TL conditional fields</a> (added in layer 45)</summary>
 		public virtual uint FFlags => default;
@@ -30,17 +30,17 @@ namespace TL
 
 	/// <summary>Object describes media contents of an encrypted message.		<para>See <a href="https://corefork.telegram.org/type/DecryptedMessageMedia"/></para></summary>
 	/// <remarks>a <see langword="null"/> value means <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaEmpty">decryptedMessageMediaEmpty</a></remarks>
-	public abstract class DecryptedMessageMedia : IObject
+	public abstract partial class DecryptedMessageMedia : IObject
 	{
 		public virtual string MimeType => default;
 		internal virtual (long size, byte[] key, byte[] iv) SizeKeyIV { get => default; set => throw new WTelegram.WTException("Incompatible DecryptedMessageMedia"); }
 	}
 
 	/// <summary>Object describes the action to which a service message is linked.		<para>See <a href="https://corefork.telegram.org/type/DecryptedMessageAction"/></para></summary>
-	public abstract class DecryptedMessageAction : IObject { }
+	public abstract partial class DecryptedMessageAction : IObject { }
 
 	/// <summary>Indicates the location of a photo, will be deprecated soon		<para>See <a href="https://corefork.telegram.org/type/FileLocation"/></para></summary>
-	public abstract class FileLocationBase : IObject
+	public abstract partial class FileLocationBase : IObject
 	{
 		/// <summary>Server volume</summary>
 		public virtual long VolumeId => default;
@@ -54,7 +54,7 @@ namespace TL
 	{
 		/// <summary>Contents of an encrypted message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessage"/></para></summary>
 		[TLDef(0x1F814F1F)]
-		public class DecryptedMessage : DecryptedMessageBase
+		public sealed partial class DecryptedMessage : DecryptedMessageBase
 		{
 			/// <summary>Random message ID, assigned by the author of message.<br/>Must be equal to the ID passed to sending method.</summary>
 			public long random_id;
@@ -74,7 +74,7 @@ namespace TL
 		}
 		/// <summary>Contents of an encrypted service message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageService"/></para></summary>
 		[TLDef(0xAA48327D)]
-		public class DecryptedMessageService : DecryptedMessageBase
+		public sealed partial class DecryptedMessageService : DecryptedMessageBase
 		{
 			/// <summary>Random message ID, assigned by the message author.<br/>Must be equal to the ID passed to the sending method.</summary>
 			public long random_id;
@@ -91,7 +91,7 @@ namespace TL
 
 		/// <summary>Photo attached to an encrypted message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaPhoto"/></para></summary>
 		[TLDef(0x32798A8C)]
-		public class DecryptedMessageMediaPhoto : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaPhoto : DecryptedMessageMedia
 		{
 			/// <summary>Content of thumbnail file (JPEGfile, quality 55, set in a square 90x90)</summary>
 			public byte[] thumb;
@@ -115,7 +115,7 @@ namespace TL
 		}
 		/// <summary>Video attached to an encrypted message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaVideo"/></para></summary>
 		[TLDef(0x4CEE6EF3)]
-		public class DecryptedMessageMediaVideo : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaVideo : DecryptedMessageMedia
 		{
 			/// <summary>Content of thumbnail file (JPEG file, quality 55, set in a square 90x90)</summary>
 			public byte[] thumb;
@@ -140,7 +140,7 @@ namespace TL
 		}
 		/// <summary>GeoPoint attached to an encrypted message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaGeoPoint"/></para></summary>
 		[TLDef(0x35480A59)]
-		public class DecryptedMessageMediaGeoPoint : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaGeoPoint : DecryptedMessageMedia
 		{
 			/// <summary>Latitude of point</summary>
 			public double lat;
@@ -149,7 +149,7 @@ namespace TL
 		}
 		/// <summary>Contact attached to an encrypted message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaContact"/></para></summary>
 		[TLDef(0x588A0A97)]
-		public class DecryptedMessageMediaContact : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaContact : DecryptedMessageMedia
 		{
 			/// <summary>Phone number</summary>
 			public string phone_number;
@@ -162,7 +162,7 @@ namespace TL
 		}
 		/// <summary>Document attached to a message in a secret chat.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaDocument"/></para></summary>
 		[TLDef(0xB095434B)]
-		public class DecryptedMessageMediaDocument : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaDocument : DecryptedMessageMedia
 		{
 			/// <summary>Thumbnail-file contents (JPEG-file, quality 55, set in a 90x90 square)</summary>
 			public byte[] thumb;
@@ -187,7 +187,7 @@ namespace TL
 		}
 		/// <summary>Audio file attached to a secret chat message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaAudio"/></para></summary>
 		[TLDef(0x6080758F)]
-		public class DecryptedMessageMediaAudio : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaAudio : DecryptedMessageMedia
 		{
 			/// <summary>Audio duration in seconds</summary>
 			public int duration;
@@ -203,42 +203,42 @@ namespace TL
 
 		/// <summary>Setting of a message lifetime after reading.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageActionSetMessageTTL"/></para></summary>
 		[TLDef(0xA1733AEC)]
-		public class DecryptedMessageActionSetMessageTTL : DecryptedMessageAction
+		public sealed partial class DecryptedMessageActionSetMessageTTL : DecryptedMessageAction
 		{
 			/// <summary>Lifetime in seconds</summary>
 			public int ttl_seconds;
 		}
 		/// <summary>Messages marked as read.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageActionReadMessages"/></para></summary>
 		[TLDef(0x0C4F40BE)]
-		public class DecryptedMessageActionReadMessages : DecryptedMessageAction
+		public sealed partial class DecryptedMessageActionReadMessages : DecryptedMessageAction
 		{
 			/// <summary>List of message IDs</summary>
 			public long[] random_ids;
 		}
 		/// <summary>Deleted messages.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageActionDeleteMessages"/></para></summary>
 		[TLDef(0x65614304)]
-		public class DecryptedMessageActionDeleteMessages : DecryptedMessageAction
+		public sealed partial class DecryptedMessageActionDeleteMessages : DecryptedMessageAction
 		{
 			/// <summary>List of deleted message IDs</summary>
 			public long[] random_ids;
 		}
 		/// <summary>A screenshot was taken.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageActionScreenshotMessages"/></para></summary>
 		[TLDef(0x8AC1F475)]
-		public class DecryptedMessageActionScreenshotMessages : DecryptedMessageAction
+		public sealed partial class DecryptedMessageActionScreenshotMessages : DecryptedMessageAction
 		{
 			/// <summary>List of affected message ids (that appeared on the screenshot)</summary>
 			public long[] random_ids;
 		}
 		/// <summary>The entire message history has been deleted.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageActionFlushHistory"/></para></summary>
 		[TLDef(0x6719E45C)]
-		public class DecryptedMessageActionFlushHistory : DecryptedMessageAction { }
+		public sealed partial class DecryptedMessageActionFlushHistory : DecryptedMessageAction { }
 	}
 
 	namespace Layer23
 	{
 		/// <summary>Image description.		<para>See <a href="https://corefork.telegram.org/constructor/photoSize"/></para></summary>
 		[TLDef(0x77BFB61B)]
-		public partial class PhotoSize : PhotoSizeBase
+		public sealed partial class PhotoSize : PhotoSizeBase
 		{
 			/// <summary><a href="https://corefork.telegram.org/api/files#image-thumbnail-types">Thumbnail type »</a></summary>
 			public string type;
@@ -255,7 +255,7 @@ namespace TL
 		}
 		/// <summary>Description of an image and its content.		<para>See <a href="https://corefork.telegram.org/constructor/photoCachedSize"/></para></summary>
 		[TLDef(0xE9A734FA)]
-		public partial class PhotoCachedSize : PhotoSizeBase
+		public sealed partial class PhotoCachedSize : PhotoSizeBase
 		{
 			/// <summary>Thumbnail type</summary>
 			public string type;
@@ -273,23 +273,23 @@ namespace TL
 
 		/// <summary>User is uploading a video.		<para>See <a href="https://corefork.telegram.org/constructor/sendMessageUploadVideoAction"/></para></summary>
 		[TLDef(0x92042FF7)]
-		public class SendMessageUploadVideoAction : SendMessageAction { }
+		public sealed partial class SendMessageUploadVideoAction : SendMessageAction { }
 		/// <summary>User is uploading a voice message.		<para>See <a href="https://corefork.telegram.org/constructor/sendMessageUploadAudioAction"/></para></summary>
 		[TLDef(0xE6AC8A6F)]
-		public class SendMessageUploadAudioAction : SendMessageAction { }
+		public sealed partial class SendMessageUploadAudioAction : SendMessageAction { }
 		/// <summary>User is uploading a photo.		<para>See <a href="https://corefork.telegram.org/constructor/sendMessageUploadPhotoAction"/></para></summary>
 		[TLDef(0x990A3C1A)]
-		public class SendMessageUploadPhotoAction : SendMessageAction { }
+		public sealed partial class SendMessageUploadPhotoAction : SendMessageAction { }
 		/// <summary>User is uploading a file.		<para>See <a href="https://corefork.telegram.org/constructor/sendMessageUploadDocumentAction"/></para></summary>
 		[TLDef(0x8FAEE98E)]
-		public class SendMessageUploadDocumentAction : SendMessageAction { }
+		public sealed partial class SendMessageUploadDocumentAction : SendMessageAction { }
 
 		/// <summary>Defines a sticker		<para>See <a href="https://corefork.telegram.org/constructor/documentAttributeSticker"/></para></summary>
 		[TLDef(0xFB0A5727)]
-		public class DocumentAttributeSticker : DocumentAttribute { }
+		public sealed partial class DocumentAttributeSticker : DocumentAttribute { }
 		/// <summary>Defines a video		<para>See <a href="https://corefork.telegram.org/constructor/documentAttributeVideo"/></para></summary>
 		[TLDef(0x5910CCCB)]
-		public class DocumentAttributeVideo : DocumentAttribute
+		public sealed partial class DocumentAttributeVideo : DocumentAttribute
 		{
 			/// <summary>Duration in seconds</summary>
 			public int duration;
@@ -300,7 +300,7 @@ namespace TL
 		}
 		/// <summary>Represents an audio file		<para>See <a href="https://corefork.telegram.org/constructor/documentAttributeAudio"/></para></summary>
 		[TLDef(0x051448E5)]
-		public class DocumentAttributeAudio : DocumentAttribute
+		public sealed partial class DocumentAttributeAudio : DocumentAttribute
 		{
 			/// <summary>Duration in seconds</summary>
 			public int duration;
@@ -308,7 +308,7 @@ namespace TL
 
 		/// <summary>Contents of an encrypted message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessage"/></para></summary>
 		[TLDef(0x204D3878)]
-		public class DecryptedMessage : DecryptedMessageBase
+		public sealed partial class DecryptedMessage : DecryptedMessageBase
 		{
 			/// <summary>Random message ID, assigned by the author of message.<br/>Must be equal to the ID passed to sending method.</summary>
 			public long random_id;
@@ -330,7 +330,7 @@ namespace TL
 		}
 		/// <summary>Contents of an encrypted service message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageService"/></para></summary>
 		[TLDef(0x73164160)]
-		public class DecryptedMessageService : DecryptedMessageBase
+		public sealed partial class DecryptedMessageService : DecryptedMessageBase
 		{
 			/// <summary>Random message ID, assigned by the message author.<br/>Must be equal to the ID passed to the sending method.</summary>
 			public long random_id;
@@ -345,7 +345,7 @@ namespace TL
 
 		/// <summary>Video attached to an encrypted message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaVideo"/></para></summary>
 		[TLDef(0x524A415D)]
-		public class DecryptedMessageMediaVideo : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaVideo : DecryptedMessageMedia
 		{
 			/// <summary>Content of thumbnail file (JPEG file, quality 55, set in a square 90x90)</summary>
 			public byte[] thumb;
@@ -375,7 +375,7 @@ namespace TL
 		}
 		/// <summary>Audio file attached to a secret chat message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaAudio"/></para></summary>
 		[TLDef(0x57E0A9CB)]
-		public class DecryptedMessageMediaAudio : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaAudio : DecryptedMessageMedia
 		{
 			/// <summary>Audio duration in seconds</summary>
 			public int duration;
@@ -395,7 +395,7 @@ namespace TL
 		}
 		/// <summary>Non-e2e documented forwarded from non-secret chat		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaExternalDocument"/></para></summary>
 		[TLDef(0xFA95B0DD)]
-		public class DecryptedMessageMediaExternalDocument : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaExternalDocument : DecryptedMessageMedia
 		{
 			/// <summary>Document ID</summary>
 			public long id;
@@ -420,7 +420,7 @@ namespace TL
 
 		/// <summary>Request for the other party in a Secret Chat to automatically resend a contiguous range of previously sent messages, as explained in <a href="https://corefork.telegram.org/api/end-to-end/seq_no">Sequence number is Secret Chats</a>.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageActionResend"/></para></summary>
 		[TLDef(0x511110B0)]
-		public class DecryptedMessageActionResend : DecryptedMessageAction
+		public sealed partial class DecryptedMessageActionResend : DecryptedMessageAction
 		{
 			/// <summary><c>out_seq_no</c> of the first message to be resent, with correct parity</summary>
 			public int start_seq_no;
@@ -429,21 +429,21 @@ namespace TL
 		}
 		/// <summary>A notification stating the API layer that is used by the client. You should use your current layer and take notice of the layer used on the other side of a conversation when sending messages.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageActionNotifyLayer"/></para></summary>
 		[TLDef(0xF3048883)]
-		public class DecryptedMessageActionNotifyLayer : DecryptedMessageAction
+		public sealed partial class DecryptedMessageActionNotifyLayer : DecryptedMessageAction
 		{
 			/// <summary>Layer number, must be <strong>17</strong> or higher (this constructor was introduced in Layer 17.</summary>
 			public int layer;
 		}
 		/// <summary>User is preparing a message: typing, recording, uploading, etc.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageActionTyping"/></para></summary>
 		[TLDef(0xCCB27641)]
-		public class DecryptedMessageActionTyping : DecryptedMessageAction
+		public sealed partial class DecryptedMessageActionTyping : DecryptedMessageAction
 		{
 			/// <summary>Type of action</summary>
 			public SendMessageAction action;
 		}
 		/// <summary>Request rekeying, see <a href="https://corefork.telegram.org/api/end-to-end/pfs">rekeying process</a>		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageActionRequestKey"/></para></summary>
 		[TLDef(0xF3C9611B)]
-		public class DecryptedMessageActionRequestKey : DecryptedMessageAction
+		public sealed partial class DecryptedMessageActionRequestKey : DecryptedMessageAction
 		{
 			/// <summary>Exchange ID</summary>
 			public long exchange_id;
@@ -452,7 +452,7 @@ namespace TL
 		}
 		/// <summary>Accept new key		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageActionAcceptKey"/></para></summary>
 		[TLDef(0x6FE1735B)]
-		public class DecryptedMessageActionAcceptKey : DecryptedMessageAction
+		public sealed partial class DecryptedMessageActionAcceptKey : DecryptedMessageAction
 		{
 			/// <summary>Exchange ID</summary>
 			public long exchange_id;
@@ -463,14 +463,14 @@ namespace TL
 		}
 		/// <summary>Abort rekeying		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageActionAbortKey"/></para></summary>
 		[TLDef(0xDD05EC6B)]
-		public class DecryptedMessageActionAbortKey : DecryptedMessageAction
+		public sealed partial class DecryptedMessageActionAbortKey : DecryptedMessageAction
 		{
 			/// <summary>Exchange ID</summary>
 			public long exchange_id;
 		}
 		/// <summary>Commit new key, see <a href="https://corefork.telegram.org/api/end-to-end/pfs">rekeying process</a>		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageActionCommitKey"/></para></summary>
 		[TLDef(0xEC2E0B9B)]
-		public class DecryptedMessageActionCommitKey : DecryptedMessageAction
+		public sealed partial class DecryptedMessageActionCommitKey : DecryptedMessageAction
 		{
 			/// <summary>Exchange ID, see <a href="https://corefork.telegram.org/api/end-to-end/pfs">rekeying process</a></summary>
 			public long exchange_id;
@@ -479,11 +479,11 @@ namespace TL
 		}
 		/// <summary>NOOP action		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageActionNoop"/></para></summary>
 		[TLDef(0xA82FDD63)]
-		public class DecryptedMessageActionNoop : DecryptedMessageAction { }
+		public sealed partial class DecryptedMessageActionNoop : DecryptedMessageAction { }
 
 		/// <summary>Sets the layer number for the contents of an encrypted message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageLayer"/></para></summary>
 		[TLDef(0x1BE31789)]
-		public class DecryptedMessageLayer : IObject
+		public sealed partial class DecryptedMessageLayer : IObject
 		{
 			/// <summary>Set of random bytes to prevent content recognition in short encrypted messages.<br/>Clients are required to check that there are at least 15 random bytes included in each message. Messages with less than 15 random bytes must be ignored.<br/>Parameter moved here from <see cref="DecryptedMessage"/> in Layer 17.</summary>
 			public byte[] random_bytes;
@@ -499,7 +499,7 @@ namespace TL
 
 		/// <summary>File is currently unavailable.		<para>See <a href="https://corefork.telegram.org/constructor/fileLocationUnavailable"/></para></summary>
 		[TLDef(0x7C596B46)]
-		public class FileLocationUnavailable : FileLocationBase
+		public sealed partial class FileLocationUnavailable : FileLocationBase
 		{
 			/// <summary>Server volume</summary>
 			public long volume_id;
@@ -517,7 +517,7 @@ namespace TL
 		}
 		/// <summary>File location.		<para>See <a href="https://corefork.telegram.org/constructor/fileLocation"/></para></summary>
 		[TLDef(0x53D69076)]
-		public class FileLocation : FileLocationBase
+		public sealed partial class FileLocation : FileLocationBase
 		{
 			/// <summary>Number of the data center holding the file</summary>
 			public int dc_id;
@@ -541,7 +541,7 @@ namespace TL
 	{
 		/// <summary>Represents an audio file		<para>See <a href="https://corefork.telegram.org/constructor/documentAttributeAudio"/></para></summary>
 		[TLDef(0xDED218E0)]
-		public class DocumentAttributeAudio : DocumentAttribute
+		public sealed partial class DocumentAttributeAudio : DocumentAttribute
 		{
 			/// <summary>Duration in seconds</summary>
 			public int duration;
@@ -556,7 +556,7 @@ namespace TL
 	{
 		/// <summary>Defines a sticker		<para>See <a href="https://corefork.telegram.org/constructor/documentAttributeSticker"/></para></summary>
 		[TLDef(0x3A556302)]
-		public class DocumentAttributeSticker : DocumentAttribute
+		public sealed partial class DocumentAttributeSticker : DocumentAttribute
 		{
 			/// <summary>Alternative emoji representation of sticker</summary>
 			public string alt;
@@ -566,7 +566,7 @@ namespace TL
 
 		/// <summary>Message entity representing a <a href="https://corefork.telegram.org/api/mentions">user mention</a>: for <em>creating</em> a mention use <see cref="InputMessageEntityMentionName"/>.		<para>See <a href="https://corefork.telegram.org/constructor/messageEntityMentionName"/></para></summary>
 		[TLDef(0x352DCA58, inheritBefore = true)]
-		public class MessageEntityMentionName : MessageEntityMention
+		public sealed partial class MessageEntityMentionName : MessageEntity
 		{
 			/// <summary>Identifier of the user that was mentioned</summary>
 			public int user_id;
@@ -574,7 +574,7 @@ namespace TL
 
 		/// <summary>Contents of an encrypted message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessage"/></para></summary>
 		[TLDef(0x36B091DE)]
-		public class DecryptedMessage : DecryptedMessageBase
+		public sealed partial class DecryptedMessage : DecryptedMessageBase
 		{
 			/// <summary>Extra bits of information, use <c>flags.HasFlag(...)</c> to test for those</summary>
 			public Flags flags;
@@ -625,7 +625,7 @@ namespace TL
 
 		/// <summary>Photo attached to an encrypted message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaPhoto"/></para></summary>
 		[TLDef(0xF1FA8D78)]
-		public class DecryptedMessageMediaPhoto : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaPhoto : DecryptedMessageMedia
 		{
 			/// <summary>Content of thumbnail file (JPEGfile, quality 55, set in a square 90x90)</summary>
 			public byte[] thumb;
@@ -651,7 +651,7 @@ namespace TL
 		}
 		/// <summary>Video attached to an encrypted message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaVideo"/></para></summary>
 		[TLDef(0x970C8C0E)]
-		public class DecryptedMessageMediaVideo : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaVideo : DecryptedMessageMedia
 		{
 			/// <summary>Content of thumbnail file (JPEG file, quality 55, set in a square 90x90)</summary>
 			public byte[] thumb;
@@ -683,7 +683,7 @@ namespace TL
 		}
 		/// <summary>Document attached to a message in a secret chat.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaDocument"/></para></summary>
 		[TLDef(0x7AFE8AE2)]
-		public class DecryptedMessageMediaDocument : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaDocument : DecryptedMessageMedia
 		{
 			/// <summary>Thumbnail-file contents (JPEG-file, quality 55, set in a 90x90 square)</summary>
 			public byte[] thumb;
@@ -711,7 +711,7 @@ namespace TL
 		}
 		/// <summary>Venue		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaVenue"/></para></summary>
 		[TLDef(0x8A0DF56F)]
-		public class DecryptedMessageMediaVenue : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaVenue : DecryptedMessageMedia
 		{
 			/// <summary>Latitude of venue</summary>
 			public double lat;
@@ -728,7 +728,7 @@ namespace TL
 		}
 		/// <summary>Webpage preview		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaWebPage"/></para></summary>
 		[TLDef(0xE50511D8)]
-		public class DecryptedMessageMediaWebPage : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaWebPage : DecryptedMessageMedia
 		{
 			/// <summary>URL of webpage</summary>
 			public string url;
@@ -739,11 +739,11 @@ namespace TL
 	{
 		/// <summary>User is uploading a round video		<para>See <a href="https://corefork.telegram.org/constructor/sendMessageUploadRoundAction"/></para></summary>
 		[TLDef(0xBB718624)]
-		public class SendMessageUploadRoundAction : SendMessageAction { }
+		public sealed partial class SendMessageUploadRoundAction : SendMessageAction { }
 
 		/// <summary>Defines a video		<para>See <a href="https://corefork.telegram.org/constructor/documentAttributeVideo"/></para></summary>
 		[TLDef(0x0EF02CE6)]
-		public class DocumentAttributeVideo : DocumentAttribute
+		public sealed partial class DocumentAttributeVideo : DocumentAttribute
 		{
 			/// <summary>Extra bits of information, use <c>flags.HasFlag(...)</c> to test for those</summary>
 			public Flags flags;
@@ -766,7 +766,7 @@ namespace TL
 	{
 		/// <summary>Contents of an encrypted message.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessage"/></para></summary>
 		[TLDef(0x91CC4674)]
-		public class DecryptedMessage : DecryptedMessageBase
+		public sealed partial class DecryptedMessage : DecryptedMessageBase
 		{
 			/// <summary>Extra bits of information, use <c>flags.HasFlag(...)</c> to test for those</summary>
 			public Flags flags;
@@ -831,7 +831,7 @@ namespace TL
 	{
 		/// <summary>Document attached to a message in a secret chat.		<para>See <a href="https://corefork.telegram.org/constructor/decryptedMessageMediaDocument"/></para></summary>
 		[TLDef(0x6ABD9782)]
-		public class DecryptedMessageMediaDocument : DecryptedMessageMedia
+		public sealed partial class DecryptedMessageMediaDocument : DecryptedMessageMedia
 		{
 			/// <summary>Thumbnail-file contents (JPEG-file, quality 55, set in a 90x90 square)</summary>
 			public byte[] thumb;

src/TL.Table.cs

@@ -4,7 +4,7 @@ using System.ComponentModel;
 
 namespace TL
 {
-	public static class Layer
+	public static partial class Layer
 	{
 		public const int Version = 176;					// fetched 08/03/2024 11:12:00
 		internal const int SecretChats = 144;
@@ -1325,7 +1325,7 @@ namespace TL
 			[typeof(UrlAuthResult)]                  = 0xA9D6DB1F, //urlAuthResultDefault
 			[typeof(ChannelLocation)]                = 0xBFB5AD8B, //channelLocationEmpty
 			[typeof(Account_Themes)]                 = 0xF41EB622, //account.themesNotModified
-			[typeof(DialogFilter)]                   = 0x363293AE, //dialogFilterDefault
+			[typeof(DialogFilterBase)]               = 0x363293AE, //dialogFilterDefault
 			[typeof(Help_CountriesList)]             = 0x93CC1F32, //help.countriesListNotModified
 			[typeof(BotCommandScope)]                = 0x2F6CB2AB, //botCommandScopeDefault
 			[typeof(Messages_SponsoredMessages)]     = 0x1839490F, //messages.sponsoredMessagesEmpty
@@ -1340,7 +1340,6 @@ namespace TL
 			[typeof(ChatReactions)]                  = 0xEAFC32BC, //chatReactionsNone
 			[typeof(Messages_Reactions)]             = 0xB06FDBDF, //messages.reactionsNotModified
 			// from TL.Secret:
-			[typeof(DialogFilterBase)]               = 0x363293AE, //dialogFilterDefault
 			[typeof(EmojiList)]                      = 0x481EADFA, //emojiListNotModified
 			[typeof(Messages_EmojiGroups)]           = 0x6FB4AD87, //messages.emojiGroupsNotModified
 			[typeof(Help_AppConfig)]                 = 0x7CDE641D, //help.appConfigNotModified

src/TL.cs

@@ -16,19 +16,19 @@ namespace TL
 	public interface IPeerResolver { IPeerInfo UserOrChat(Peer peer); }
 
 	[AttributeUsage(AttributeTargets.Class)]
-	public class TLDefAttribute(uint ctorNb) : Attribute
+	public sealed class TLDefAttribute(uint ctorNb) : Attribute
 	{
 		public readonly uint CtorNb = ctorNb;
 		public bool inheritBefore;
 	}
 
 	[AttributeUsage(AttributeTargets.Field)]
-	public class IfFlagAttribute(int bit) : Attribute
+	public sealed class IfFlagAttribute(int bit) : Attribute
 	{
 		public readonly int Bit = bit;
 	}
 
-	public class RpcException(int code, string message, int x = -1) : WTelegram.WTException(message)
+	public sealed class RpcException(int code, string message, int x = -1) : WTelegram.WTException(message)
 	{
 		public readonly int Code = code;
 		/// <summary>The value of X in the message, -1 if no variable X was found</summary>
@@ -36,7 +36,7 @@ namespace TL
 		public override string ToString() { var str = base.ToString(); return str.Insert(str.IndexOf(':') + 1, " " + Code); }
 	}
 
-	public class ReactorError : IObject
+	public sealed partial class ReactorError : IObject
 	{
 		public Exception Exception;
 	}
@@ -352,7 +352,7 @@ namespace TL
 		public static implicit operator byte[](Int256 int256) => int256.raw;
 	}
 
-	public class UpdateAffectedMessages : Update // auto-generated for OnOwnUpdate in case of such API call result
+	public sealed partial class UpdateAffectedMessages : Update // auto-generated for OnOwnUpdate in case of such API call result
 	{
 		public Messages_AffectedMessages affected;
 		public override (long, int, int) GetMBox() => (0, affected.pts, affected.pts_count);
@@ -361,21 +361,21 @@ namespace TL
 	// Below TL types are commented "parsed manually" from https://github.com/telegramdesktop/tdesktop/blob/dev/Telegram/Resources/tl/mtproto.tl
 
 	[TLDef(0x7A19CB76)] //RSA_public_key#7a19cb76 n:bytes e:bytes = RSAPublicKey
-	public class RSAPublicKey : IObject
+	public sealed partial class RSAPublicKey : IObject
 	{
 		public byte[] n;
 		public byte[] e;
 	}
 
 	[TLDef(0xF35C6D01)] //rpc_result#f35c6d01 req_msg_id:long result:Object = RpcResult
-	public class RpcResult : IObject
+	public sealed partial class RpcResult : IObject
 	{
 		public long req_msg_id;
 		public object result;
 	}
 
 	[TLDef(0x5BB8E511)] //message#5bb8e511 msg_id:long seqno:int bytes:int body:Object = Message
-	public class _Message(long msgId, int seqNo, IObject obj) : IObject
+	public sealed partial class _Message(long msgId, int seqNo, IObject obj) : IObject
 	{
 		public long msg_id = msgId;
 		public int seq_no = seqNo;
@@ -384,10 +384,10 @@ namespace TL
 	}
 
 	[TLDef(0x73F1F8DC)] //msg_container#73f1f8dc messages:vector<%Message> = MessageContainer
-	public class MsgContainer : IObject { public _Message[] messages; }
+	public sealed partial class MsgContainer : IObject { public _Message[] messages; }
 	[TLDef(0xE06046B2)] //msg_copy#e06046b2 orig_message:Message = MessageCopy
-	public class MsgCopy : IObject { public _Message orig_message; }
+	public sealed partial class MsgCopy : IObject { public _Message orig_message; }
 
 	[TLDef(0x3072CFA1)] //gzip_packed#3072cfa1 packed_data:bytes = Object
-	public class GzipPacked : IObject { public byte[] packed_data; }
+	public sealed partial class GzipPacked : IObject { public byte[] packed_data; }
 }

src/TlsStream.cs

@@ -11,7 +11,7 @@ using System.Threading.Tasks;
 
 namespace WTelegram
 {
-	class TlsStream(Stream innerStream) : Helpers.IndirectStream(innerStream)
+	internal sealed class TlsStream(Stream innerStream) : Helpers.IndirectStream(innerStream)
 	{
 		private int _tlsFrameleft;
 		private readonly byte[] _tlsSendHeader = [0x17, 0x03, 0x03, 0, 0];