are variables in c# case sensitive?

Question

does compiler differentiates between age and Age?

Answer 1

yes.
variable are case sensitive in c#.

Answer 2

Yes, once the language is case sensitive you must to be careful in all you write.

Answer 3

yes.variables in c# are case sensitive

Answer 4

Yes. Many languages are, but not all (such as Pascal, Ada, Fortran, SQL)