How to create custom event in System.Web.UI.UserControl (C#):

How to create custom event in System.Web.UI.UserControl (C#):

//0.define delegate:
        public delegate void ToolBarClick(string command);

//1. in control declare  instance: 
        public ToolBarClick Click;

//and raiser:
        protected void rpt_ToolBarAction_ItemCommand(object source, RepeaterCommandEventArgs e){
            if (Click!=null){
                Click(e.CommandArgument.ToString());
            }
        }

//2. On page add handler:
        protected void Page_Load(object sender, EventArgs e)
        {
            ToolBar1.Click = new ToolBarClick(ToolBar_Click);

//and event function:   
        protected void ToolBar_Click(string s)
        {