C#: Using value types as event arguments

eventplayground.cs

using System;
namespace NewArgs
{
    public class EventPlayground
    {
        public event EventHandler<int> OnSelectedIndex;

        public void Select(int x) {
            OnSelectedIndex?.Invoke(this, x);
        }

        static void Main()
        {
            var emitter = new EventPlayground();
            emitter.OnSelectedIndex += (object sender, int e) =>
            {
                Console.WriteLine($"Selected Index {e}");
            };
            emitter.Select(42);
        }
    }
}