Refactored methods, renamed variables, added readonly fields and constants.
-> DetonateMine(int[,] field, int fieldSize, int coordinateX, int coordinateY)
-> GenerateMines()
-> AskUserSize()

Refactored methods:
-> DetonateMine(int[,] field, int fieldSize, int coordinateX, int
coordinateY)
-> GenerateMines()
-> AskUserFieldSize()