Chapter review

For review, 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;
using System.Collections.Generic;
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 partial class _Default : System.Web.UI.Page
{
    private void ShowSquare(double x) => 
    sampLabel.Text += "<br>" + (x * x);//expression bodied function
    protected void Button1_Click(object sender, EventArgs e)
    {
        //make list of double values
        List<double> vals = 
        new List<double>(new double[] { 1, 2, 4, 5, 6, 8 });
        //call ShowSquare on each value inside the list
 ...