MARKUS

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Markus.Mvvm.ToolKit

{

    public static class EventRaiser

    {

        public static void Raise(this EventHandler handler, object sender)

        {

            handler?.Invoke(sender, EventArgs.Empty);

        }

        public static void Raise<T>(this EventHandler<EventArgs<T>> handler, object sender, T value)

        {

            handler?.Invoke(sender, new EventArgs<T>(value));

        }

        public static void Raise<T>(this EventHandler<T> handler, object sender, T value) where T : EventArgs

        {

            handler?.Invoke(sender, value);

        }

        public static void Raise<T>(this EventHandler<EventArgs<T>> handler, object sender, EventArgs<T> value)

        {

            handler?.Invoke(sender, value);

        }

    }

    public class EventArgs<T> : EventArgs

    {

        public EventArgs(T value)

        {

            Value = value;

        }

        public T Value { get; private set; }

    }

}