[Jumpstart C#] Console Demos - Calculating Area

using System;

class CalculatingArea
{
    static void Main()
    {
        Console.WriteLine("This program calculates the area of a rectangle or a triangle");

        Console.WriteLine("Enter a and b (for rectangle) or a and h (for triangle): ");
        int a = Int32.Parse(Console.ReadLine());
        int b = Int32.Parse(Console.ReadLine());

        Console.Write("Enter 1 for a rectangle or 2 for a triangle: ");

        int choice = Int32.Parse(Console.ReadLine());
        double area = (double)(a * b) / choice;
        Console.WriteLine("The area of your figure is {0}", area);
    }
}