静态装饰组合Static Decorator Compsition

public abstract class Shape
    {
        public abstract string AsString();
    }
    public class Circel : Shape
    {
        float ridus;

        public Circel():this(0.5f)
        {

        }
        public Circel(float ridus)
        {
            this.ridus = ridus;
        }

        public override string AsString()
        {
            return $"Circle Ridus:{ridus}";
        }

        public void Resize(float size)
        {
            ridus *= size;
        }
    }

    public class Square : Shape
    {
        float Side;

        public Square():this(0.5f)
        {

        }
        public Square(float side)
        {
            Side = side;
        }

        public override string AsString()
        {
            return $"Square Side: {Side}";
        }
    }
    public class ColorShape : Shape
    {
        Shape shape;
        string color;

        public ColorShape(Shape shape, string color)
        {
            this.shape = shape;
            this.color = color;
        }

        public override string AsString()
        {
            return $"{shape.AsString()} Color :{color}";
        }
    }

    public class Transparent : Shape
    {
        Shape shape;
        float percentage;

        public Transparent(Shape shape, float _percentage)
        {
            this.shape = shape;
            this.percentage = _percentage;
        }

        public override string AsString()
        {
            return $"{shape.AsString()} Transparent:{percentage * 100.0}%";
        }
    }
    public class ColorShape<T> : Shape where T : Shape, new()
    {
        private string color;
        private T shape = new T();
        public ColorShape():this("Blue")
        { 
        }
        public ColorShape(string color)
        {
            this.color = color;
        }

       
        public override string AsString()
        {
            return $"{shape.AsString()} Color :{color}";
        }
    }

    public class TransparentShape<T> : Shape where T : Shape, new()
    {
        private float transparency;

        public TransparentShape(float transparency)
        {
            this.transparency = transparency;
        }

        private T shape = new T();
        public TransparentShape() : this(0)
        {
        }  
        public override string AsString()
        {
            return $"{shape.AsString()} Transparent :{transparency}";
        }
    }



    class Program
    {
        static void Main(string[] args)
        { 
            var redSquare = new ColorShape<Square>();
            Console.WriteLine(redSquare.AsString());

            var tranSquare = new TransparentShape<Circel>();
            Console.WriteLine(tranSquare.AsString());

            var tranRedSquare =new TransparentShape<ColorShape<Square>>(0.6f);
            Console.WriteLine(tranRedSquare.AsString());
        }

    }