C# Type GetGenericParameterConstraints

Description

Type GetGenericParameterConstraints returns an array of Type objects that represent the constraints on the current generic type parameter.

Syntax

Type.GetGenericParameterConstraints has the following syntax.


public virtual Type[] GetGenericParameterConstraints()

Returns

Type.GetGenericParameterConstraints method returns

Example

The following code example defines a generic type Test with two type parameters that have different constraints.


//  ww  w .  j  a  v  a  2s .co m
using System;
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)
        {
            Type[] tpConstraints = tp.GetGenericParameterConstraints();
            foreach (Type tpc in tpConstraints)
            {
                Console.WriteLine("\t{0}", tpc);
            }
        }
    }

}

The code above generates the following result.