why does my C# client that uses Library A need to have a using statement for Library B (which A uses)

Question

I have:

• Main Program Class - uses Library A
• Library A - has partial classes which mix in methods from Library B
• Library B - mix in methods &a

Answer 1

A partial class in c# is just a class that exists in multiple files. You cannot have 2 files that define a partial class in different namespaces.