and now a more safe way via refleciton

Pilz.UI.Telerik/Dialogs/RadFlyoutBase.Statics.cs

@@ -123,13 +123,8 @@ partial class RadFlyoutBase
 
     private static void TryCloseFlyout()
     {
-        try
+        if (typeof(RadFlyoutManager).GetField("flyoutInstance", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Static).GetValue(null) is FlyoutScreen instance
-        {
+            && instance.IsActive)
             RadFlyoutManager.Close();
-        }
-        catch (Exception)
-        {
-            // Ignore
-        }
     }
 }