Creating an array

There is a lot of code to enter in this chapter, but it's mechanical. First, we will create an array, so enter the following between the curly braces under the line beginning with protected void Button1_Click...:

IEnumerable<int> scores = new int[] { 45, 98, 99, 78, 89, 87, 77, 67, 71, 81 };

Here, IEnumerable is the data type and scores is the name of the array. It doesn't matter what values you put into the array.

Averaging the values in a list

Now, first we will find an average of this list. So, enter the following next:

var goodStudentAverage = (from score in scores where score >= 90 select score).Average();

We will select students who score 90 or above. Imagine, those are the semester...