diff --git a/MBTiles/WPF/MBTiles.WPF.csproj b/MBTiles/WPF/MBTiles.WPF.csproj
index b0939266..94b05804 100644
--- a/MBTiles/WPF/MBTiles.WPF.csproj
+++ b/MBTiles/WPF/MBTiles.WPF.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <TargetFrameworks>net9.0-windows;net462</TargetFrameworks>
-        <LangVersion Condition="'$(TargetFramework)'=='net462'">8.0</LangVersion>
+        <LangVersion Condition="'$(TargetFramework)'=='net462'">12.0</LangVersion>
         <UseWPF>true</UseWPF>
         <DefineConstants>WPF</DefineConstants>
         <RootNamespace>MapControl.MBTiles</RootNamespace>
diff --git a/MapUiTools/Avalonia/MapMenuItem.Avalonia.cs b/MapUiTools/Avalonia/MapMenuItem.Avalonia.cs
index 0e6ea9d7..177f5bab 100644
--- a/MapUiTools/Avalonia/MapMenuItem.Avalonia.cs
+++ b/MapUiTools/Avalonia/MapMenuItem.Avalonia.cs
@@ -4,16 +4,11 @@ using Avalonia.Media;
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Threading.Tasks;
 
 namespace MapControl.UiTools
 {
     public abstract partial class MapMenuItem : MenuItem
     {
-        public abstract bool GetIsChecked(MapBase map);
-
-        public abstract Task ExecuteAsync(MapBase map);
-
         protected MapMenuItem()
         {
             Icon = new TextBlock
@@ -23,26 +18,8 @@ namespace MapControl.UiTools
                 VerticalAlignment = Avalonia.Layout.VerticalAlignment.Center,
             };
 
-            Loaded += (s, e) =>
-            {
-                if (DataContext is MapBase map)
-                {
-                    IsChecked = GetIsChecked(map);
-                }
-            };
-
-            Click += async (s, e) =>
-            {
-                if (DataContext is MapBase map)
-                {
-                    await ExecuteAsync(map);
-
-                    foreach (var item in ParentMenuItems)
-                    {
-                        item.IsChecked = item.GetIsChecked(map);
-                    }
-                }
-            };
+            Loaded += (s, e) => Initialize();
+            Click += (s, e) => Execute();
         }
 
         public string Text
diff --git a/MapUiTools/Shared/MapLayerMenuItem.cs b/MapUiTools/Shared/MapLayerMenuItem.cs
index 11acf835..832bfac4 100644
--- a/MapUiTools/Shared/MapLayerMenuItem.cs
+++ b/MapUiTools/Shared/MapLayerMenuItem.cs
@@ -29,7 +29,7 @@ namespace MapControl.UiTools
 #endif
         public FrameworkElement MapLayer { get; set; }
 
-        public override bool GetIsChecked(MapBase map)
+        protected override bool GetIsChecked(MapBase map)
         {
             return MapLayer != null && map.Children.Contains(MapLayer);
         }
diff --git a/MapUiTools/Shared/MapMenuItem.cs b/MapUiTools/Shared/MapMenuItem.cs
new file mode 100644
index 00000000..47e78389
--- /dev/null
+++ b/MapUiTools/Shared/MapMenuItem.cs
@@ -0,0 +1,30 @@
+using System.Threading.Tasks;
+
+namespace MapControl.UiTools
+{
+    public abstract partial class MapMenuItem
+    {
+        public abstract Task ExecuteAsync(MapBase map);
+
+        protected abstract bool GetIsChecked(MapBase map);
+
+        protected virtual bool GetIsEnabled(MapBase map) => true;
+
+        private void Initialize()
+        {
+            if (DataContext is MapBase map)
+            {
+                IsEnabled = GetIsEnabled(map);
+                IsChecked = GetIsChecked(map);
+            }
+        }
+
+        private async void Execute()
+        {
+            if (DataContext is MapBase map)
+            {
+                await ExecuteAsync(map);
+            }
+        }
+    }
+}
diff --git a/MapUiTools/Shared/MapProjectionMenuItem.cs b/MapUiTools/Shared/MapProjectionMenuItem.cs
index 56856f2b..cb5dcf49 100644
--- a/MapUiTools/Shared/MapProjectionMenuItem.cs
+++ b/MapUiTools/Shared/MapProjectionMenuItem.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Diagnostics;
+using System.Linq;
 using System.Threading.Tasks;
 #if WPF
 using System.Windows.Markup;
@@ -14,20 +15,25 @@ using Avalonia.Metadata;
 namespace MapControl.UiTools
 {
 #if WPF
-    [ContentProperty(nameof(MapProjection))]
+    [ContentProperty(nameof(CrsId))]
 #elif UWP || WINUI
-    [ContentProperty(Name = nameof(MapProjection))]
+    [ContentProperty(Name = nameof(CrsId))]
 #endif
     public partial class MapProjectionMenuItem : MapMenuItem
     {
 #if AVALONIA
         [Content]
 #endif
-        public string MapProjection { get; set; }
+        public string CrsId { get; set; }
 
-        public override bool GetIsChecked(MapBase map)
+        protected override bool GetIsEnabled(MapBase map)
         {
-            return map.MapProjection.ToString() == MapProjection;
+            return map.MapLayer is not IMapLayer mapLayer || mapLayer.SupportedCrsIds.Contains(CrsId);
+        }
+
+        protected override bool GetIsChecked(MapBase map)
+        {
+            return map.MapProjection.CrsId == CrsId;
         }
 
         public override Task ExecuteAsync(MapBase map)
@@ -36,7 +42,7 @@ namespace MapControl.UiTools
             {
                 try
                 {
-                    map.MapProjection = MapControl.MapProjection.Parse(MapProjection);
+                    map.MapProjection = MapProjection.Parse(CrsId);
                 }
                 catch (Exception ex)
                 {
diff --git a/MapUiTools/UWP/MapUiTools.UWP.csproj b/MapUiTools/UWP/MapUiTools.UWP.csproj
index cc311997..eb98d71e 100644
--- a/MapUiTools/UWP/MapUiTools.UWP.csproj
+++ b/MapUiTools/UWP/MapUiTools.UWP.csproj
@@ -6,6 +6,7 @@
         <DefineConstants>UWP</DefineConstants>
         <RootNamespace>MapControl.UiTools</RootNamespace>
         <AssemblyTitle>XAML Map Control UI Tools Library for UWP</AssemblyTitle>
+        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
         <DisableRuntimeMarshalling>true</DisableRuntimeMarshalling>
         <DefaultLanguage>en-US</DefaultLanguage>
     </PropertyGroup>
diff --git a/MapUiTools/WPF/MapMenuItem.WPF.cs b/MapUiTools/WPF/MapMenuItem.WPF.cs
index 5a5df19a..55a9d8bd 100644
--- a/MapUiTools/WPF/MapMenuItem.WPF.cs
+++ b/MapUiTools/WPF/MapMenuItem.WPF.cs
@@ -1,38 +1,15 @@
 using System.Collections.Generic;
 using System.Linq;
-using System.Threading.Tasks;
 using System.Windows.Controls;
 
 namespace MapControl.UiTools
 {
-    public abstract partial class MapMenuItem : MenuItem
+    public partial class MapMenuItem : MenuItem
     {
-        public abstract bool GetIsChecked(MapBase map);
-
-        public abstract Task ExecuteAsync(MapBase map);
-
         protected MapMenuItem()
         {
-            Loaded += (s, e) =>
-            {
-                if (DataContext is MapBase map)
-                {
-                    IsChecked = GetIsChecked(map);
-                }
-            };
-
-            Click += async (s, e) =>
-            {
-                if (DataContext is MapBase map)
-                {
-                    await ExecuteAsync(map);
-
-                    foreach (var item in ParentMenuItems)
-                    {
-                        item.IsChecked = item.GetIsChecked(map);
-                    }
-                }
-            };
+            Loaded += (s, e) => Initialize();
+            Click += (s, e) => Execute();
         }
 
         public string Text
diff --git a/MapUiTools/WPF/MapUiTools.WPF.csproj b/MapUiTools/WPF/MapUiTools.WPF.csproj
index b3ee134b..acbabd9d 100644
--- a/MapUiTools/WPF/MapUiTools.WPF.csproj
+++ b/MapUiTools/WPF/MapUiTools.WPF.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <TargetFrameworks>net9.0-windows;net462</TargetFrameworks>
-        <LangVersion Condition="'$(TargetFramework)'=='net462'">8.0</LangVersion>
+        <LangVersion Condition="'$(TargetFramework)'=='net462'">12.0</LangVersion>
         <UseWPF>true</UseWPF>
         <DefineConstants>WPF</DefineConstants>
         <RootNamespace>MapControl.UiTools</RootNamespace>
diff --git a/MapUiTools/WinUI/MapMenuItem.WinUI.cs b/MapUiTools/WinUI/MapMenuItem.WinUI.cs
index 0c29a993..8395dd1e 100644
--- a/MapUiTools/WinUI/MapMenuItem.WinUI.cs
+++ b/MapUiTools/WinUI/MapMenuItem.WinUI.cs
@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using System.Linq;
-using System.Threading.Tasks;
 #if UWP
 using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Media;
@@ -13,34 +12,15 @@ namespace MapControl.UiTools
 {
     public abstract partial class MapMenuItem : ToggleMenuFlyoutItem
     {
-        public abstract bool GetIsChecked(MapBase map);
-
-        public abstract Task ExecuteAsync(MapBase map);
-
         protected MapMenuItem()
         {
             Loaded += (s, e) =>
             {
                 ParentMenuItems = ((Panel)VisualTreeHelper.GetParent(this)).Children.OfType<MapMenuItem>().ToList();
-
-                if (DataContext is MapBase map)
-                {
-                    IsChecked = GetIsChecked(map);
-                }
+                Initialize();
             };
 
-            Click += async (s, e) =>
-            {
-                if (DataContext is MapBase map)
-                {
-                    await ExecuteAsync(map);
-
-                    foreach (var item in ParentMenuItems)
-                    {
-                        item.IsChecked = item.GetIsChecked(map);
-                    }
-                }
-            };
+            Click += (s, e) => Execute();
         }
 
         protected IList<MapMenuItem> ParentMenuItems { get; private set; }
diff --git a/MapUiTools/WinUI/MapUiTools.WinUI.csproj b/MapUiTools/WinUI/MapUiTools.WinUI.csproj
index 81e4153a..50a1a170 100644
--- a/MapUiTools/WinUI/MapUiTools.WinUI.csproj
+++ b/MapUiTools/WinUI/MapUiTools.WinUI.csproj
@@ -5,6 +5,7 @@
         <DefineConstants>WINUI</DefineConstants>
         <RootNamespace>MapControl.UiTools</RootNamespace>
         <AssemblyTitle>XAML Map Control UI Tools Library for WinUI</AssemblyTitle>
+        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     </PropertyGroup>
 
     <ItemGroup>