the requested operation cannot be performed on a file with a user-mapped section open

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Posted on by Ken Manhattan

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Hi everyone,

While editing some code in Visual Studio, suddenly I cannot save due to this error :

The object that I'm open is a Class, if I close the message (press OK) it will prompt for Save As. And if I just close it (without save), in the tab will show new tab with the class in design mode (not the code editor mode, but the one wilt the view of class name with its method listed). Is this the one that Visual Studio refer to "user-mapped section open" ?

But I don't know from where it is open? I tried to closed multiple time, also close VS and open again, then when open the code editor again, I make sure the design mode of the class is not appear, but every time I want to save the code editor, it will always give me the message, means until now I cannot save my edit.

Anyone ever experience this and how to resolve it ?

Thanks,

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Ken Manhattan 558 on at

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I had to close everything and restart my VM, in order to resolve this issue.

Solved.

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