title: Could not load file or assembly 'System.Web.Http.WebHost, Version=4.0.0.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35'
body: <p>In Visual Studio 2012 I created an ASP.NET MVC 4 project where the target framework is the .NET Framework 4.5. When I deployed my project to a web server it gave the following error:</p>
  
  <pre><code>    Could not load file or assembly 'System.Web.Http.WebHost, Version=4.0.0.0, Culture=neutral, 
  PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file 
  specified.
  
  Description: An unhandled exception occurred during the execution of the current web request.
   Please review the stack trace for more information about the error and where
  it originated in the code. 
  
  Exception Details: System.IO.FileNotFoundException: Could not load file or 
  assembly 'System.Web.Http.WebHost, Version=4.0.0.0, Culture=neutral,
   PublicKeyToken=31bf3856ad364e35' or one of its dependencies.
   The system cannot find the file specified.
  
  Source Error: 
  
  
  Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.34237
  </code></pre>