diff --git a/Source/OpenTK/Platform/Utilities.cs b/Source/OpenTK/Platform/Utilities.cs
index 1d6801c6..54b3a633 100644
--- a/Source/OpenTK/Platform/Utilities.cs
+++ b/Source/OpenTK/Platform/Utilities.cs
@@ -179,6 +179,7 @@ namespace OpenTK.Platform
                         .GetField("ErrorExceptions", System.Reflection.BindingFlags.Static |
                             System.Reflection.BindingFlags.NonPublic)
                         .SetValue(null, true);
+                    throw_on_error = true;
                 }
                 else if (!value && throw_on_error)
                 {
@@ -186,6 +187,7 @@ namespace OpenTK.Platform
                         .GetField("ErrorExceptions", System.Reflection.BindingFlags.Static |
                             System.Reflection.BindingFlags.NonPublic)
                         .SetValue(null, false);
+                    throw_on_error = false;
                 }
             }
         }
diff --git a/Source/OpenTK/Platform/Windows/WinGLNative.cs b/Source/OpenTK/Platform/Windows/WinGLNative.cs
index 8e08c862..828e5cf4 100644
--- a/Source/OpenTK/Platform/Windows/WinGLNative.cs
+++ b/Source/OpenTK/Platform/Windows/WinGLNative.cs
@@ -28,7 +28,7 @@ namespace OpenTK.Platform.Windows
         private WinGLContext glContext;
         private DisplayMode mode = new DisplayMode();
 
-        private bool fullscreen = false;
+        private bool fullscreen;
         private bool disposed;
         private bool isExiting;
         private bool exists;
diff --git a/Source/OpenTK/Platform/Windows/WinRawKeyboard.cs b/Source/OpenTK/Platform/Windows/WinRawKeyboard.cs
index f0a2a3e9..0ceb86f8 100644
--- a/Source/OpenTK/Platform/Windows/WinRawKeyboard.cs
+++ b/Source/OpenTK/Platform/Windows/WinRawKeyboard.cs
@@ -302,12 +302,10 @@ namespace OpenTK.Platform.Windows
                             }
                             return false;
                     }
-                    break;
 
                 default:
                     throw new ApplicationException("Windows raw keyboard driver received invalid data.");
             }
-            return false;
         }
 
         #endregion