title: error "unable to copy file because it is being used by another process
body: <p>I use windowsform application using C# language, I have many forms, and when I want to traverse from one to another, I use <strong>this.Hide();</strong> </p>
  
  <p>When I use this method, I receive the shown error,</p>
  
  <p>I know that the solution is to end process using windows task manager, But the question is that <strong>Is there any way I can use travel between forms without leading to this error?</strong></p>
  
  <pre><code> Error  9   Unable to copy file "obj\x86\Debug\WindowsFormsApplication1.exe" to "bin\Debug\WindowsFormsApplication1.exe". The process cannot access the file 'bin\Debug\WindowsFormsApplication1.exe' because it is being used by another process.  C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets  2868
  </code></pre>