stuck on chapter 'Using a UserControl' from asp.net tutorial

After I build and compile I get this error message

Server Error in '/' Application.
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: ASPNET: Make sure that the class defined in this code file matches the 'inherits' attribute, and that it extends the correct base class (e.g. Page or UserControl).

Source Error:

Line 14: namespace FirstWebSite
Line 15: {
Line 16: public partial class UserInfoBoxControl : System.Web.UI.UserControl
Line 17: {
Line 18: private string userName;


I also saw notice that green underlining on 'UserInfoBoxControl' in my login.aspx file

<My:UserInfoBoxControl runat="server" ID="MyUserInfoBoxControl" />

Apparently because Element 'UserInfoBoxControl' is not a known element.

I did not declare the user control in the login.aspx page but I added it in the web.config file as

<add tagPrefix="My" src="~/controls/UserInfoBoxControl.ascx" tagName="UserInfoBoxControl"/>

and I did put the controls in a directory named Controls

please someone help as I am completely new to asp.net, thanks

I figured it out.

First change your UserInfoBoxControl.ascx declaration from CodeFile to CodeBehind and make sure to add the namespace FirstWebsite to the inherit attribute:

<%@ Control Language="C#" AutoEventWireup="true" Codebehind="UserInfoBoxControl.ascx.cs" Inherits="FirstWebSite.UserInfoBoxControl" %>

modify your web.config file
<add tagPrefix="My" src="~/controls/UserInfoBoxControl.ascx" tagName="UserInfoBoxControl"/>

and make sure to create a directory called Controls where you add the control files UserInfoBoxControl.ascx, UserInfoBoxControl.ascx.cs, UserInfoBoxControl.ascx.designer