// Method to capture the Length of Rectangle and validate input is not a zero, negative number or a nonnumeric value
        private static double recLength()
        {
            // Variable for Length
            var length = 0.0;

            try {
                if (Double.TryParse(Console.ReadLine(), out length))
                
                try {
                    // Validate input is a positive number
                    if (length <= 0.0)

                    catch {
                            // Error Message if input is zero or a negative number
                            Console.WriteLine("\n\tSorry, you enter a number zero or less. Please try again.");

                          }
                        catch {
                                // Error Message if input is not numeric
                                Console.WriteLine("\n\tSorry, you entered a non-numeric value. Please try again.");
                              }

                    finally {
                            // Prompt for Length of Rectangle
                            Console.Write("\n\tPlease Enter the Length of Rectangle: ");

                            // Call Method again
                            length = recLength();

                            return length;
                }
            }
        }