Uses for static generic classes?

Question

What are the key uses of a Static Generic Class in C#? When should they be used? What examples best illustrate their usage?

e.g.

Answer 1

One use of static generic classes that I recently learned was possible is to define a constraint on the class level for the type, then the constraint applies to all the static members of the class, what I also learned is that this is not allowed for static generic classes that define extention methods.

For example if you are going to create a static generic class and you know all the generic types should be IComparable (just an example) then you can do the following.

static class MyClass where T : IComparable
{
  public static void DoSomething(T a, T b)
  {
  }

  public static void DoSomethingElse(T a, T b)
  {
  }
}

Notice that I did not need to apply the constraint to all the member, but just at the class level.