Write a C# program to find the sum of diagonal elements of a square array of size n. Input the value of n and the array elements from the keyboard.Print the array elements and the sum of the diagonal elements as shown below. Explain the program in few words.

Sample I/O

Enter the size of the array :3 Enter the array elements 1 5 2 1 3 4 1 2 Array elements are : 1 54 2 1 3 4 1 2 The sum of diagonal elements = 4