title: Is there a replacement for MEF in .NET Core (or ASP.NET 5)
body: <p>We know that .NET Core (the open-source components) are only a subset of the full .NET Framework, and that ASP.NET 5 (and MVC 6) is built on .NET Core. Does this mean that Managed Extensibility Framework (MEF) is not available in ASP.NET 5?</p>
  
  <p>If so, is there any replacement for dynamic extensibility available in .NET Core?</p>
  
  <p>I have a number of applications that use MEF to dynamically load plugins and external integrations and it would be a pity if they were locked into the .NET Framework just because they use MEF.</p>