title: ASP.NET 5 System.Runtime.Caching
body: <p>I am converting an existing .Net 4.5 MVC 5 project to a new ASP.NET 5 project. One of my files is referencing the System.Runtime.Caching namespace but on moving this file to the new project this namespace cannot be found. </p>
  
  <p>I have added System.Runtime as a dependency in the new project, but the .Caching bit seems to be missing from this. Has anybody experienced a similar problem?</p>