title: Visual Studio "Could not load file or assembly. Operation is not supported" error in Release mode
body: <p>I have a small project in C# that uses two external dll files. One is the Redmine.Net.Api.dll and the other is NLog.dll. I'm using Visual Studio 2010. I added both files as Reference to my project. The problem is that when I run the project in Debug mode, it compiles, but when I switch to Release, it says:</p>
  
  <blockquote>
    <p>Error 1   Could not load file or assembly
    'file:///C:\project\lib\Redmine.Net.Api.dll' or one of its
    dependencies. Operation is not supported. (Exception from HRESULT:
    0x80131515)   C:\project\SGEN project</p>
  </blockquote>
  
  <p>How can I fix this?</p>