I want to know that how I can View/Retrieve data from one C# Class(e.g. "abc.cs") in another C# Class(e.g. "def.cs") in same project ?

I have to access the variables from one class to another class. So kindly tell me that do I need to declare those variables "public", or there will be some other solution?

Sincerely,
Muzaffar Ali Rana.