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