public static void Main()
Console.WriteLine("A score of " + dblGrade.ToString() + " is a A");
else if (dblGrade >= dblB)
Console.WriteLine("A score of " + dblGrade.ToString() + " is a B");
else if (dblGrade >= dblC)
Console.WriteLine("A score of " + dblGrade.ToString() + " is a C");
else if (dblGrade >= dblD)
Console.WriteLine("A score of " + dblGrade.ToString() + " is a D");
Console.WriteLine("A score of " + dblGrade.ToString() + " is a F");