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