public static void Main()
Console.Write("Enter a length: "); if(Double.TryParse(Console.ReadLine(),out length)){ Console.Write("Enter a width: "); if(Double.TryParse(Console.ReadLine(),out width)){ CalculateAreaAndPerimeter(ref area, ref perimeter, length, width);
Console.WriteLine("Area: "+area); Console.WriteLine("Perimeter: "+perimeter); Console.WriteLine("Invalid input"); Console.WriteLine("Invalid input"); public static void CalculateAreaAndPerimeter(ref double area, ref double perimeter,double length,double width){ perimeter = (2*length)+(2*width);
