Checkpoint

The code we just studied in class, slightly expanded and with an application program, is available to download.

Validating Inputs (Optional)

Edit the Program.cs file of the project you previously download so that:

User entering a value different from A, a, H, h, O and o would be asked again, and asked as long as they do not give a valid answer,
User entering a credit score not between 300 and 850, or that is not an integer, would be asked again, and asked as long as they do not give a valid answer,
User entering an amount needed or a downpaiment that is not a decimal, or is a negative decimal, would be asked again, and asked as long as they do not give a valid answer.
(Optional) Use the ToLower() or ToUpper() methods of the char class to make the program more readable (you will be able to greatly simplify the if statement).
(Optional, hard) Write a method that takes a character as an argument, and return the string returning the type of loan designed by that character. Then, use this method in the ToString and in the application program instead of doing it “by hand”.

A (partial) solution that implements (partially) the first, next to last and last item of the previous list is available to download.