static void Main()
{
CultureInfo invC = CultureInfo.InvariantCulture;
Console.WriteLine("Choose your way to calculate the area:");
Console.Write("\u250c");
Console.Write("------------------------------");
Console.WriteLine("\u2510");
Console.WriteLine("| 1. Side and Altitude |");
Console.WriteLine("| 2. Three Sides (Heron) |");
Console.WriteLine("| 3. Two Sides And Angle (SAS) |");
Console.Write("\u2514");
Console.Write("------------------------------");
Console.WriteLine("\u2518");
int input = int.Parse(Console.ReadLine());
switch (input)
{
case 1:
SideAndAltitude();
break;
case 2:
Heron();
break;
case 3:
SAS();
break;
default:
Console.WriteLine("Invalid Input - Please Select 1, 2 or 3");
break;
}
}