c# : Get EventHandler Change Notification without Creating Instance or Making it static

Question

c# : Get EventHandler Change Notification without Creating Instance or Making it static

Public class A
{
  public  EventHandler KeyboardCloseEventHandlerTest;


   private void someMethod(object sender, EventArgs e)
        {             
            KeyboardCloseEventHandlerTest?.Invoke(sender, e);           
        }
}

Public class B
{
public  EventHandler KeyboardCloseEventHandlerTest1;

    private void Tesssss(object sender, EventArgs e)
    {             
    }

}

I need class A EventHandler to registered in Class B and Fire Class Method.

I can't make anything static not create a instance. More Importantly it should not cause performance Issue.

Answer 1

Hi,

Welcome to our Microsoft platform!

You can use unity container ,example

using Unity;

 public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
    }
    public interface IClass
    {
        void method();
    }

    public class A : IClass
    {
        public void method()
        {
            MessageBox.Show("A");
        }
    }

    public class B : IClass
    {
        public IClass IClass { get; set; }
        UnityContainer container = new UnityContainer();
        //create Class A
        IClass classA;
        public B()
        {
            container.RegisterType<IClass, A>("NameA");
            classA = container.Resolve<IClass>("NameA");
        }



        public void method()
        {
            MessageBox.Show("B");
        }
    }

Thanks.