public Circle() { while (true) { Console.Write("Type of value being entered (Dimension/Area): "); type = Console.ReadLine().ToUpper(); if (type == "AREA" || type == "DIMENSION") { break; } else { Console.WriteLine("Enter a valid input"); } } if (type == "DIMENSION") { Console.Write("Please enter the radius of the Circle: "); radius = UserInput.AcceptNumberInput(); } else if (type == "AREA") { Console.Write("Please enter the area of Circle: "); area = UserInput.AcceptNumberInput(); } }