Add DownloadFileRequest Class

TLSharp.Core/Requests/DownloadFileRequest.cs

@@ -0,0 +1,36 @@
+using System;
+using System.IO;
+using TeleSharp.TL;
+namespace TLSharp.Core.Requests
+{
+    public class DownloadFileRequest : MTProtoRequest
+    {
+        private GetFileArgs args = new GetFileArgs();
+        public TeleSharp.TL.File file;
+
+        public DownloadFileRequest(InputFileLocation loc,int offset=0,int limit=0)
+        {
+            args.location = loc;
+            args.offset = offset;
+            args.limit = limit;
+        }
+
+        public override void OnSend(BinaryWriter writer)
+        {
+            Serializer.Serialize(args, typeof(InputFileLocation), writer);
+        }
+
+        public override void OnResponse(BinaryReader reader)
+        {
+            file = (TeleSharp.TL.File)Deserializer.Deserialize(typeof(TeleSharp.TL.File), reader);
+        }
+
+        public override void OnException(Exception exception)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override bool Confirmed => true;
+        public override bool Responded { get; }
+    }
+}