Chapter review

For review purposes, the complete version of the Default.aspx.cs file for this chapter, including comments, is shown 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;
//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 bool Compare(double x, double y);
public delegate double Multiply(double x, double y);
public partial class _Default : System.Web.UI.Page
{
    protected void Button1_Click(object sender, EventArgs e)
    {
        double x = 10, y = 25; //declare two variables
        //the two variables are accessible inside the lambda expressions
        Compare comp = (a, b) => (a == b);//define comparison lambda
        //invoke the lambda in the line below
        sampLabel...