Avoid using the global namespace in the MINIMAL configuration, as it confuses the Mono compiler.

Source/OpenTK/Minimal.cs

@@ -2175,23 +2175,28 @@ namespace OpenTK
     #endregion
 }
 
-#region Graphics
+// Need a different namespace to avoid clash with OpenTK.Graphics.
-
+namespace OpenTK.Minimal
-sealed class Graphics : IDisposable
 {
-    public static Graphics FromImage(OpenTK.Image img)
+    #region Graphics
+
+    sealed class Graphics : IDisposable
     {
-        return new Graphics();
+        public static Graphics FromImage(OpenTK.Image img)
+        {
+            return new Graphics();
+        }
+
+        public void Dispose()
+        { }
+
+        internal void DrawImage(OpenTK.Bitmap bitmap, int p, int p_2, int p_3, int p_4)
+        {
+        }
     }
 
-    public void Dispose()
+    #endregion
-    { }
-
-    internal void DrawImage(OpenTK.Bitmap bitmap, int p, int p_2, int p_3, int p_4)
-    {
-    }
 }
 
-#endregion
 
 #endif

Source/OpenTK/Platform/MacOS/CarbonGLNative.cs

@@ -755,7 +755,7 @@ namespace OpenTK.Platform.MacOS
                 
                 bitmap = new Bitmap(128, 128);
 #if MINIMAL
-                using (global::Graphics g = global::Graphics.FromImage(bitmap))
+                using (OpenTK.Minimal.Graphics g = OpenTK.Minimal.Graphics.FromImage(bitmap))
 #else
                 using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap))
 #endif