Put data from array into string?

Question

C++ / C#

I don’t really understand the question, so I apologize in advance for my possible nonsense.

There is a problem, how to put data from the string[] array into a string?
For example array: "John, Alex, Scott"
Tried to do this:
string pname = pnames[0];
and write "John" to pname, but gives the error "Object reference not set to an instance of an object."

Answer 1

Object reference not set to an instance of an object

Somewhere there was null.