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; //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 { protected void Button1_Click(object sender, EventArgs e) { int x = 25, y = 34;//declare and set two variables sampLabel.Text = $"x={x}, y={y}";//display variables GenMethods.Swap (ref x, ref y);//swap values sampLabel.Text += $"<br>x={x}, y={y}";//display swapped values sampLabel.Text += GenMethods.Compare (x, y); } }