diff --git a/Source/OpenTK/GameWindow.cs b/Source/OpenTK/GameWindow.cs
index d4574aa8..a6c92aa5 100644
--- a/Source/OpenTK/GameWindow.cs
+++ b/Source/OpenTK/GameWindow.cs
@@ -250,12 +250,12 @@ namespace OpenTK
             get
             {
                 throw new NotImplementedException();
-                return glWindow.Visible;
+                //return glWindow.Visible;
             }
             set
             {
                 throw new NotImplementedException();
-                glWindow.Visible = value;
+                //glWindow.Visible = value;
             }
         }