I have a web user control called EditUserInfo.ascx that I'm working on in Visual Studio 2005. I added an <asp:TextBox id="company" runat="server"> to the page and an <asp:RequiredFieldValidator id="companyValidator" runat="server" ControlToValidate="company" ErrorMessage="error">. When I run the updated user control, the required field validator doesn't work, and I noticed that the code-behind file (EditUserInfo.ascx.cs) hasn't been changed even though I added two new controls. Does anybody know how I get VS to update the code-behind file? Thanks.