Get Type for parameter constraints on the current generic type in CSharp

using System;/*from  w w  w .j a  v a2s .  co  m*/
using System.Reflection;

public interface ITest {}
public class Base {}
public class Test<T,U> 
    where T : Base, ITest 
    where U : class, new() {}
public class Derived : Base, ITest {}

public class Example
{
    public static void Main()
    {
        Type def = typeof(Test<,>);
        Type[] defparams = def.GetGenericArguments();
        foreach (Type tp in defparams)
        {
            Console.WriteLine("\r\nType parameter: {0}", tp.Name);
            Type[] tpConstraints = tp.GetGenericParameterConstraints();
            foreach (Type tpc in tpConstraints)
            {
                Console.WriteLine("\t{0}", tpc);
            }
        }
    }
}