5. Still in the Code Behind of the master page, you need to add some code that preselects the correct
item in the list again when the page loads. The best place to do this is in the Page class’s Load
event. If you’re using C#, the Page_Load handler should already be there. When you’re using
Visual Basic you can add one in two different ways: either double-click the page anywhere in
Design View (this works in C# as well), or select (Page Events) from the left drop-down list just
above the Document Window in the Code Behind (shown in Figure 6-21), and then choose Load
from the second drop-down. This is a nice way to add handlers for other controls as well, like
Button and DropDownList controls.