Question about type or namespace error

Please help with error CS0101: The namespace'; already contains a definitio for...

C# Error CS0234 – The type or namespace name 'name' does not exist in the namespace 'namespace'

GitLab Project Management: Features, Agile Workflows & Pro Tips

C# Error CS0101 – The namespace 'namespace' already contains a definition for 'type'

C# Error CS0246 – The type or namespace name 'type/namespace' could not be found