Lesson review

For review, the complete version of Default.aspx.cs for this lesson, including comments, is displayed in the following code block:

//using is a directive
//System is a name space
//name space is a collection of features that our needs to run
using System;
using System.Threading;
//public means accessible anywhere
//partial means this class is split over multiple files
//class is a keyword and think of it as the outermost level of grouping
//:System.Web.UI.Page means our page inherits the features of a Page
public delegate void LabelUpdater();//declare delegate
public partial class _Default : System.Web.UI.Page
{
    protected void Button1_Click(object sender, EventArgs e)
    {
        LabelUpdater lu = UpdateLabelOne; //make delegate and assign 
        //function
        lu += UpdateLabelTwo;//assign another function
        lu += new LabelUpdater(UpdateMainLabel);//assign another 
        //function
        lu.Invoke();//invoke delegate
    }
    //this function is called...