Question

Is there something like this already available in the .NET framework?

public class EventArgs<T> : EventArgs {
    private readonly T data;

    public EventArgs(T data) {
        this.data = data;
    }
}

I know there is a generic event handler, I’m kinda surprised I can’t find a generic EventArgs class.

Thanks

Answer 1

No. Mainly because it fails the tests posed before something it added to the framework

• How useful is it? (Marginly — only useful if you only need one data member. As opposed to EventHandler<> which is good for event handler regardless of the number of parameters used.)
• How hard is it to write yourself? (not very hard)
• Is it needed in the framework itself? (No. Distinct classes are used, so new members could be added in the future if needed. As opposed to Func<> & Action<> which are used by the framework.)

(UPDATED based on comments)