Custom Control in ASP.NET C#

Question

I created a simple custom control that only inherits from the Literal control, and doesn\'t have any extensions yet, code is empty.

Namespace: CustomControl

Answer 1

The problem lies in your <%@ Register TagPrefix="web" Namespace="CustomControls" %> tag: it misses the assembly name!

It must become <%@ Register TagPrefix="web" Namespace="CustomControls" Assembly="YourAssemblyName" %>. If you have difficulties finding the assembly name for your class here are a few hints:

1. If you created the class inside the web application's Visual Studio project, or in a separate DLL (shared library) project, then right-click the project and go to Properties to get the assembly name
2. If you created the .cs file in App_Code directory, ASP.App_Code should work

Otherwise please give us some information about project layout!