diff --git a/samples/ControlCatalog.Desktop/Program.cs b/samples/ControlCatalog.Desktop/Program.cs
index b151cabf43..a2048005a4 100644
--- a/samples/ControlCatalog.Desktop/Program.cs
+++ b/samples/ControlCatalog.Desktop/Program.cs
@@ -10,6 +10,7 @@ namespace ControlCatalog
 {
     internal class Program
     {
+        [STAThread]
         static void Main(string[] args)
         {
             // TODO: Make this work with GTK/Skia/Cairo depending on command-line args
diff --git a/samples/ControlCatalog.NetCore/Program.cs b/samples/ControlCatalog.NetCore/Program.cs
index 346535d39d..b45a93455e 100644
--- a/samples/ControlCatalog.NetCore/Program.cs
+++ b/samples/ControlCatalog.NetCore/Program.cs
@@ -9,8 +9,10 @@ namespace ControlCatalog.NetCore
 {
     static class Program
     {
+        
         static void Main(string[] args)
         {
+            Thread.CurrentThread.TrySetApartmentState(ApartmentState.STA);
             if (args.Contains("--wait-for-attach"))
             {
                 Console.WriteLine("Attach debugger and use 'Set next statement'");