MAC：Mono Helloworld的例子

Question

我在我的OSX Yosemite上完成了Mono的全新安装，并在http://www.mono-project.com/docs/getting-started/mono-basics/上尝试了这些示例。

控制台Hello World示例运行没有问题但是当我尝试WindowsForm Hello World时，我收到以下错误：

System.EntryPointNotFoundException: GdipCreateFromContext_macosx at (wrapper managed-to-native) System.Drawing.GDIPlus:GdipCreateFromContext_macosx (intptr,int,int,intptr&)
  at System.Drawing.Graphics.FromHwnd (IntPtr hwnd) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.XplatUICarbon.PaintEventStart (System.Windows.Forms.Message& msg, IntPtr handle, Boolean client) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.XplatUI.PaintEventStart (System.Windows.Forms.Message& msg, IntPtr handle, Boolean client) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.WmPaint (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.ScrollableControl.  at System.Windows.Forms.ScrollableControl.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.ContainerControl.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Form.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control+ControlWindowTarget.OnMessage (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control+ControlNativeWindow.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg, IntPtr wParam, IntPtr lParam) [0x00000] in <filename unknown>:0 
Chads-MacBook-Pro:C# ChadLeong$ mono hello.exe
System.EntryPointNotFoundException: GdipCreateFromContext_macosx
  at (wrapper managed-to-native) System.Drawing.GDIPlus:GdipCreateFromContext_macosx (intptr,int,int,intptr&)
  at System.Drawing.Graphics.FromHwnd (IntPtr hwnd) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.XplatUICarbon.PaintEventStart (System.Windows.Forms.Message& msg, IntPtr handle, Boolean client) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.XplatUI.PaintEventStart (System.Windows.Forms.Message& msg, IntPtr handle, Boolean client) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.WmPaint (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.ScrollableControl.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.ContainerControl.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Form.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control+ControlWindowTarget.OnMessage (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control+ControlNativeWindow.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg, IntPtr wParam, IntPtr lParam) [0x00000] in <filename unknown>:0 

有人知道吗？ 谢谢！！

Answer 1

这是3.10版本中已知的错误/回归： https ： //bugzilla.xamarin.com/show_bug.cgi？ id = 23553

这个Xamarin论坛帖子提供了一个修复版本： http ： //forums.xamarin.com/discussion/27011/fix-for-gdipcreatefromcontext-macosx-and-other-macios-gdi-issues