Create a method that takes a one-dimensional integer array and returns the number of redundant elements in the array and prints the redundant elements to the console. Handle all corner cases and if there is any expected exception, handle it properly using exception handling technique. Avoid general exception handling.

For example:

For this array A = [1, 1, 1, 2, 2, 3]

Redundant(A) returns 2 and prints 1, 2 on the console

c# language