How to choose the unit test framework in C#? (xunit,nunit,VS unit test)

There are a lot of frameworks for Unit Test in C#,and some frameworks are open source.

But I don't know how to choose them?

Is there a way(or rule) to choose the framework for unit test?

I found a similar question:
Unit test, NUnit or Visual studio?

But there is nothing about xunit framework.

Is there another better choice for us,expect the three one(xunit,nunit,VS unit test)?