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Error 1 Unable to copy file "obj\\Debug\\WindowsFormsApplication3.exe" to ".\\bin\\Debug\\WindowsFormsApplication3.exe". The process cannot access the file '.\\bin\\Debug\\WindowsFormsApplication3.exe' because it is being used by another process. C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\Microsoft.Common.targets 2869

Error 1 Unable to copy file "obj\\Debug\\WindowsFormsApplication3.exe" to ".\\bin\\Debug\\WindowsFormsApplication3.exe". The process cannot access the file '.\\bin\\Debug\\WindowsFormsApplication3.exe' because it is being used by another process. C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\Microsoft.Common.targets 2869

It might be that your executable is still running. Next time this happens, can you open the task manager and see if windowsformsapplication3 is in the list?

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