public class Triangle : IShape, IColor
if (value.Length > 0) _Name = value;
else Console.WriteLine("Please enter a name");
public string Color {get;set;}
public double Base{ get; set;}
public double Height {get; set;}
public Triangle(string name, double b, double height, string color)
public double CalculateArea()
return Color.ToLower() == "yellow";
public static void Main()
Triangle t = new Triangle("Triangle", 8.5,4.2, "blue");
Console.WriteLine(t.CalculateArea());
Console.WriteLine(t.IsYellow());