C# EventHandler EventArgs Demo

using System;

namespace ConsoleApplication1
{
    class Program
    {

        static void Main(string[] args)
        {
            TestClass testClass = new TestClass();
            testClass.testEventHandler+=testAdd;
            testClass.TestRun( new testEvenargv(3, 4));
        }

        static void testAdd(object o,testEvenargv e)
        {
            Console.WriteLine((e.x+e.y).ToString());

        }

    }

    class TestClass
    {
        public event EventHandler<testEvenargv> testEventHandler;

        public void TestRun(testEvenargv e)
        {
            if(testEventHandler != null)
            {
                testEventHandler(this,e);
            }
        }
    }

    class testEvenargv : EventArgs
    {
        public int x;
        public int y;

        public testEvenargv(int x, int y)
        {
            this.x = x;
            this.y = y;
        }
    }


}