C#

public event EventHandler<...EventArgs> MyEvent = delegate { };

----------------------------------
Be excellent to each other

using System;

public class MyPage
{
    // use EventHandler<TEventArgs> for maintenance simplicity
    public event EventHandler<PageMenuInfoChangedEventArgs> PageMenuInfoChanged;
    // private variable
    private object _PageMenuInfo;
    // public property
    public object PageMenuInfo
    {
        get { return _PageMenuInfo; }
        set
        {
            if (_PageMenuInfo != value)
            {
                _PageMenuInfo = value;
                // pass event args to method
                OnPageMenuInfoChanged(new PageMenuInfoChangedEventArgs("Changed!"));
            }
        }
    }
    protected virtual void OnPageMenuInfoChanged(PageMenuInfoChangedEventArgs e)
    {
        // copy event
        EventHandler<PageMenuInfoChangedEventArgs> eh = PageMenuInfoChanged;
        if (eh != null)
            // raise event using standard pattern
            eh(this, e);
    }
}
public class PageMenuInfoChangedEventArgs : EventArgs
{
    public PageMenuInfoChangedEventArgs(string message)
    {
        _Message = message;
    }
    private string _Message;
    public string Message
    {
        get { return _Message; }
    }
}