Thank you for your feedback. We show this warning in all C# and VB.NET project types. If the file of the class you have is located directly in the VB project's directory and no namespace is defined explicitly, you should not get this kind of warning. However, if the file is in a subdirectory, a namespace matching the relative path to the project's main directory should be declared. For instance - Namespace SubFolder1.SubFolder2.
The idea is the same if you have a C# project. The only difference is that you should explicitly type the default namespace of the project. For example : namespace DefaultNamespace.SubFolder1.SubFolder2.
If you do that and still get this error, could you give us an information how to reproduce it, so we can fix it.
Your help is highly appreciated!
the Telerik team
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