Android - Xamarin - The name ‘Resource’ does not exist in the current context / Changing namespace issue

ERROR:

The name ‘Resource’ does not exist in the current context,

CAUSE:
- You tried to change namespaces in the project.
Most of the time when you try to work with open source code  , you might like to change the naming convention relevant to your  project (depending on the license) .

When you try to change namespace in the code, there are 3 major places it affects when compiling.

In this  3 items are dynamically created. But they don't get modified if you make a major change like Namespace in your code.

1. Project default Namespace setting.
2. Resource.design.cs
3. obj/debug/ *
4. bin/debug/*


FIX:

1. Change the 'default namespace' setting in 'Projects' > [project name] Options - in general tab.
2. Rebuild the project and if you get the same error again , open all the files (or Find and replace) the old Namespaces with new Namespace.
3. Rebuild again this will create a new Resource.design.cs 
4. If the Error occurs again - Open this file and verify the New namespace appears in the code. 
5. If the file is verified, go to 'obj/debug' , 'bin/debug' folders (by default they don't showup in the Xamarin studio. So open the project folder in File Explorer) - delete all the files.
6. Rebuild again - it should compile like a charm. If not make sure 'obj/debug' , 'bin/debug' - folders are empty and new Resource.design.cs is included in the 'Resource' folder and rebuild again .