C# - Create an EventHandler that can take any number of parameters

Question

I wish to create a custom EventHandler that can have any number of objects as its parameters and the objects it gets isn\'t known in advance.

I know I can pass it an Obj

Answer 1

EventHandler is just a delegate.

You can create delegate like this:

public delegate void Foo(params object[] args);

And event:

public event Foo Bar;

You will end up with firing event like this:

Bar(1, "");

But, as @Kent Boogaart said, you should create events using EventHandler, so better approach would be creating class:

public class MyEventArgs : EventArgs
{
    public MyEventArgs(params object[] args)
    {
        Args = args;
    }

    public object[] Args { get; set; }
}

And event:

public event EventHandler Bar2;

So you will fire event like this:

Bar2(this, new MyEventArgs(1, ""));