title: Error 166 Unable to copy file "obj\x86\Debug\FileName.exe" to "bin\Debug\FileName.exe"
body: <p>Suddenly began to get this error when I try to Build a project:</p>
  
  <blockquote>
    <p>Error 166 Unable to copy file
    "obj\x86\Debug\ObjectRecognitionDriver.exe"  to
    "bin\Debug\ObjectRecognitionDriver.exe". The process cannot access the
    file 'bin\Debug\ObjectRecognitionDriver.exe' because it is being used
    by another process.</p>
  </blockquote>
  
  <p>Any idea what cause to this error and how to solve it?  </p>