[Mono-winforms-list] OpenFileDialog Exception

[Stifu]

If ArrayList is buggy, it should be fixed then. But meanwhile, maybe we could
work around such issues in WinForms by using a generic list instead
(assuming the list is not exposed anywhere). .NET 1.x is no longer
supported, and generic lists perform better anyway.


sa5webber wrote
> 
> Looking into this further leads the problem to
> mcs/class/corlib/System.Collections/ArrayList.cs. I'm apparently not the
> only one to encounter this problem, but it doesn't look like its been
> addressed yet. Here is the trace from my issue. 
> 
> System.InvalidOperationException: List has changed.
>   at System.Collections.ArrayList+SimpleEnumerator.MoveNext () [0x00000]
> in <filename unknown>:0 
>   at System.Windows.Forms.Form.ShowDialog (IWin32Window owner) [0x00000]
> in <filename unknown>:0 
>   at (wrapper remoting-invoke-with-check)
> System.Windows.Forms.Form:ShowDialog (System.Windows.Forms.IWin32Window)
>   at System.Windows.Forms.CommonDialog.ShowDialog (IWin32Window owner)
> [0x00000] in <filename unknown>:0 
>   at System.Windows.Forms.CommonDialog.ShowDialog () [0x00000] in
> <filename unknown>:0 
>   at (wrapper remoting-invoke-with-check)
> System.Windows.Forms.CommonDialog:ShowDialog ()
>   at B2RfTestSet.B2RfTestSet.btnLoadScript_Click (System.Object sender,
> System.EventArgs e) [0x00000] in <filename unknown>:0 
>   at System.Windows.Forms.Control.OnClick (System.EventArgs e) [0x00000]
> in <filename unknown>:0 
>   at System.Windows.Forms.Button.OnClick (System.EventArgs e) [0x00000] in
> <filename unknown>:0 
>   at System.Windows.Forms.ButtonBase.OnMouseUp
> (System.Windows.Forms.MouseEventArgs mevent) [0x00000] in <filename
> unknown>:0 
>   at System.Windows.Forms.Button.OnMouseUp
> (System.Windows.Forms.MouseEventArgs mevent) [0x00000] in <filename
> unknown>:0 
>   at System.Windows.Forms.Control.WmLButtonUp
> (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.ButtonBase.WndProc
> (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
>   at System.Windows.Forms.Button.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 
> 
> 
> All I have to do to recreate the problem is create an OpenFileDialog()
> along with a button to launch the OpenFileDialog() dialog. I then
> repeatedly click the button to open the dialog and then then cancel it. I
> do this maybe about 10 times. At some point during the open process, the
> application crashes with the above error.
> 


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