Unable to copy file "obj\Debug\xyzproj.exe" to "bin\Debug\xyzproj.exe". The process cannot access the file 'bin\Debug\xyzproj.exe' because it is being used by another process.

If you come across the error in visual studio like “Unable to copy file "obj\Debug\xyzproj.exe" to "bin\Debug\xyzproj.exe". The process cannot access the file 'bin\Debug\xyzproj.exe' because it is being used by another process.”

Solution: - It simply means that your EXE is already running. Close already running exe or window, then build / rebuild and run your application.