title: IIS Express Worker Process doesn't release assembly
body: <p>I have a MVC 5 Project called <code>MyApp</code> which compiles into <code>MyApp.dll</code>
  I'm using Visual Studio 2015 and compiling targeting .net Framework 4.5.1</p>
  
  <p>After developing a while I can't compile anymore because the <code>IIS Express Worker Process</code> doesn't release the file <code>\obj\Debug\MyApp.dll</code> </p>
  
  <p>Strange thing that if I do a full recompile afterwards somehow the assembly gets freed and i can then start debugging again, at least most of the time.</p>
  
  <p>(And in some cases a recompile doesn't help anymore and i have to start killing the process)</p>
  
  <p>Any Idea why the IIS Express Worker Process does block my assembly? </p>
  
  <p>The Error Showing in VS 2015:
  <a href="https://i.stack.imgur.com/IxOze.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IxOze.png" alt="enter image description here"></a></p>