If A is a template for actual type, then why is typeof(A<,>) allowed?

Question

class Program
{
    static void Main(string[] args)
    {
        Type t = typeof(A<,>);
        Console.WriteLine(typeof(A<,>)); // prints A\'2[T1,T2]
          


        

Answer 1

It is accepted because it is a generic type.

It is an open generic type (where they type parameters have not been specified), but a type none the less.

See the discussion here (What exactly is an “open generic type”).

And on MSDN (typeof):

The typeof operator can also be used on open generic types.