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.Linq; //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) { IEnumerable<int> scores = new int[] { 45, 98, 99, 78, 89, 87, 77, 67, 71, 81 }; //array of integers //line 17 below selects all scores 90 or above, and averages them, //giving back a double value var goodStudentAverage = (from score in scores where score >= 90 select...