Write a program using C# that decodes a secret messages read from a text file using an "alphabetic shift." So, for example, a shift might appear as:

COMPUTER with a shift of 2 would be EQORWVGT

ORIGINAL: ABCDE...XYZ

SHIFTED: CDEFG...ZAB

You must utilize stepwise refinement to break this program into appropriate and lesscomplicated components, say:

1.) Read the encoded message from the attached MessageIn.txt file,

2.) Count the instances of each character in the file,

3.) The most common character in the message should be an "E". Use this information to calculate the amount of the shift,

4.) Print out the decoded message.

MessageIn.txt

HVWGWGHVSPSGHQCADIHSFSLSFQWGSWVOJSSJSFSLDSFWSBQSR