I have written the following simple test in trying to learn Castle Windsor\'s Fluent Interface:
using NUnit.Framework;
using Castle.Windsor;
using System.Col
If this error caused by changing the namespace, make sur that the folder of that project is renamed to the same name, and close VS.NET Edit the project which has the problem with Notepad and replace there nodes
"RootNamespace>New_Name_Of_Folder_Of_Your_Project_Namespace"RootNamespace> "AssemblyName>New_Name_Of_Folder_Of_Your_Project_Namespace"AssemblyName>