C＃：你应该在哪里放置事件处理程序委托？

I have this class:

我有这堂课:

public class GenericEventArgs<T> : EventArgs
{
    public GenericEventArgs() : this(default(T)) {}
    public GenericEventArgs(T value) { Value = value; }
    public T Value { get; private set; }
}
public class Gene