Add a case in a C# program

Explanation how works the application : This application removes letters in several words to help user memorize texts. In order to help learning lessons, the program displays any text file sentence per sentence, and only shows start letters for a few words. The user must type remaining letters. Say that for incomplete words, parameter IncompleteStatus=-1. Currently, word status shifts to 0 (not asked any more) only when the expected answer has been given. You will have to add a new case for a switch from -1 to 0: when all chances have been given. explanation of task to do : Example Load attached [login to view URL] with level=108, click on generate quiz, you will get screenshot 1. Type letter a for each of the 6 incomplete words as shown in screenshot 2. As in screenshot 3, you will see that: - 3 words are not incomplete any more, because "a" was the expected answer; - "entre__" is still incomplete because "p" was expected instead of typed "a"; - the 2 instances of "accords" are still shown are incomplete, yet there is no remaining letter to be typed. They should be shown as normal words.