Display Package in C#

using System;
using System.IO;
class typeofUsing
{
    static void Main()
    {
        Type t = typeof (IO);
        Console.WriteLine(t.FullName);
        if (t.IsClass) Console.WriteLine("Is a class.");
        if (t.IsAbstract) Console.WriteLine("Is abstract.");
        else Console.WriteLine("Is concrete.");
    }
}