Caesar Cipher Shift (using alphabet array)

Question

I am currently writing a Caesar Cipher program in C# for my assignment and I am having a problem.

I am approaching this task using an array where I store the whole a

Answer 1

Why don't you just use character's ASCII values. I would convert ciphertext to lower case first. For example a's asci value is 97. I would write a method to extract 97 every characters so a=0,b=1..... z=25. Then for every character in your ciphertext get -3 shifted value of that char.For example input char d should return value 0 which corresponds a.