I am looking something similar to typedef in C++ in C#. Basically, I have a
Person class. Then, I want to declare new type called Beneficiary using the
Person class.

I tried using the following:

using System;

namespace X
using Beneficiary = Person;

The problem with this is that it only works in the file scope. If I want to
use the class in other files, I have to declare them all over again.

I want to declare once in a file and use them other places just like the
other classes.

Be Cool!