Add platform guards for Windows APIs.

.editorconfig

@@ -114,6 +114,7 @@ dotnet_style_qualification_for_field = false:silent
 
 # IDE0130: Namespace does not match folder structure
 dotnet_diagnostic.IDE0130.severity = error
+dotnet_diagnostic.CA1416.severity = error
 
 [*.cs]
 csharp_indent_labels = one_less_than_current
@@ -174,3 +175,4 @@ dotnet_diagnostic.CS8602.severity = error
 
 # CS8631: The type cannot be used as type parameter in the generic type or method. Nullability of type argument doesn't match constraint type.
 dotnet_diagnostic.CS8631.severity = error
+csharp_style_prefer_primary_constructors = true:suggestion

Desktop.Win/Program.cs

@@ -14,6 +14,7 @@
 using Avalonia;
 using Immense.RemoteControl.Desktop.UI;
 using Desktop.Shared.Services;
+using System.Runtime.Versioning;
 
 namespace Remotely.Desktop.Win;
 
@@ -26,6 +27,8 @@ public static AppBuilder BuildAvaloniaApp()
             .WithInterFont()
             .LogToTrace();
 
+
+    [SupportedOSPlatform("windows")]
     public static async Task Main(string[] args)
     {
         var version = AppVersionHelper.GetAppVersion();