09.TextProcessingExercise-Caesar Cipher

09.Caesar Cipher
Write a program that returns an encrypted version of the same text. Encrypt the text by shifting each character with three positions forward. For example A would be replaced by D, B would become E, and so on. Print the encrypted text.
Examples

Input                     Output
Programming is cool!      Surjudpplqj#lv#frro$
One year has 365 days.    Rqh#|hdu#kdv#698#gd|v1

using System;

public class Program
{
    public static void Main()
    {
        var text = Console.ReadLine();
            var encryptedText = "";
            for (int i = 0; i < text.Length; i++)
            {
                encryptedText += (char)(text[i] + 3);
            }
            Console.WriteLine(encryptedText);
    }
}