using System;

​

public class Foo

{

    public void PrintType<T>(T o)

    {

        var oType = o.GetType();

        var tType = typeof(T);

​

        Console.WriteLine(oType.FullName);

        Console.WriteLine(tType.FullName);

    }

}

​

var foo = new Foo();

​

foo.PrintType("asd");

foo.PrintType((object)"asd");

foo.PrintType<object>("asd");