Circle Perimeter and Area

using System;

class CirclePerimeterAndArea
{
    static void Main()
    {
        Console.Write("r=");
        double r = double.Parse(Console.ReadLine());
        double p = 2 * (Math.PI) * r;
        double s = Math.PI * (r * r);
        Console.WriteLine("Perimeter is: {0}", Math.Round(p,2));
        Console.WriteLine("Area is: {0}", Math.Round(s,2));
    }
}