New to C# (How to use while loops to check through multiple arrays)

 int[] dgDormCostArray = { 1500, 1600, 1800, 2500 };
int[] dgMealPlanArray = { 600, 1200, 1700 };
string[] dgDormListArray = { "Allen Hall", "Pike Hall", "Farthing Hall", "University Suites" };
string[] dgMealPlanChoiceArray = { "7 meals per week", "14 meals per week", "Unlimited meals" };