title: Is it possible to use MSTest and xUnit in the same Visual Studio solution in separate projects with .NET Core?
body: <p>The reason I ask this question is because we started a .NET Core project using MSTest and we have lots of them. But now we want to transition to xUnit without having to change existing unit tests.</p>
  
  <p>If it is possible, how is that done? Currently using project.json file. Can I just add the runner in the project.json? I don't know how to have two runners in project.json.</p>