Hi I am very new to C#. In an attempt to create a small program that asks the user to input grades and then outputs the grade average, I ran into some issues. This is what I have so far.
I know that it is no where near done, and probably wrong. I would just need to know how to assign the grades A,B,C,D,F and give them values for the calculations. Can anyone help in this matter?

Thanks
Tom

string[] grades = new String[5];



int index = 0;

//loop to have the user input arrays values dynamically
for (index = 0; index <= 4; index++)
{
Console.WriteLine("Enter of your grade " + (index + 1) + ": ");

grades[index] = Console.ReadLine();
}
// loop to print out array values
Console.WriteLine("\nThese are the grades you entered.");
Console.WriteLine("Your Grade average is" index++ / 5);

for (index = 0; index <= 4; index++)
{
Console.WriteLine(grades[index] + "\n");
}



Console.WriteLine("\nPress [Enter] key to exit.");
Console.ReadLine();
}