There are two source code files shown. The ASP.NET file is called IndexingServiceWithCSharp.aspx. It must be associated with a code behind page called IndexingServiceWithCSharp.aspx.cs.

Note that if you want to use this sample source code to show users a graphical representation of how relevant each search result is to their query, you will need to create a set of images called 1bars.png to 10bars.png inclusive, then put them in an images subfolder. Alternatively, matches may be represented as percentages or omitted altogether.