C# 应该有多重继承吗 [关闭]

C# 不支持多重继承

csharp
// 定义一个接口
interface IShape
{
    double GetArea();
}
// 定义一个类，实现接口
class Rectangle : IShape
{
    double width;
    double height;
    public Rectangle(double width, double height)
    {
        this.width = width;
        this.height = height;
    }
    public double GetArea()
    {
        return width * height;
    }
}
// 定义另一个类，实现接口
class Circle : IShape
{
    double radius;
    public Circle(double radius)
    {
        this.radius = radius;
    }
    public double GetArea()
    {
        return Math.PI * radius * radius;
    }
}
// 使用接口实现的类
class Program
{
    static void Main(string[] args)
    {
        Rectangle rectangle = new Rectangle(3, 4);
        Circle circle = new Circle(5);
        Console.WriteLine("矩形的面积：" + rectangle.GetArea());
        Console.WriteLine("圆形的面积：" + circle.GetArea());
    }
}