public interface IShape {
public class Triangle: IShape, IColor
Console.WriteLine("Name must be longer than 0 characters.");
public Triangle(string N, double B, double H, string C) {
public double CalculateArea(){
if(Color.ToUpper() == "YELLOW"){
public static void Main()
Triangle one = new Triangle("Triangle", 8.5, 4.2, "blue");
Console.WriteLine(one.CalculateArea());
Console.WriteLine(one.IsYellow());