编辑“︁C Sharp 接口实现”︁（章节）

== 接口实现示例 ==
下面是一个完整的示例，展示如何定义接口并实现它：

<syntaxhighlight lang="csharp">
// 定义接口
public interface IShape
{
    double CalculateArea();
    string GetShapeName();
}

// 实现接口
public class Circle : IShape
{
    public double Radius { get; set; }
    
    public double CalculateArea()
    {
        return Math.PI * Radius * Radius;
    }
    
    public string GetShapeName()
    {
        return "Circle";
    }
}

public class Rectangle : IShape
{
    public double Width { get; set; }
    public double Height { get; set; }
    
    public double CalculateArea()
    {
        return Width * Height;
    }
    
    public string GetShapeName()
    {
        return "Rectangle";
    }
}

// 使用示例
class Program
{
    static void Main()
    {
        IShape circle = new Circle { Radius = 5 };
        IShape rectangle = new Rectangle { Width = 4, Height = 6 };
        
        Console.WriteLine($"{circle.GetShapeName()} area: {circle.CalculateArea()}");
        Console.WriteLine($"{rectangle.GetShapeName()} area: {rectangle.CalculateArea()}");
    }
}
</syntaxhighlight>

输出：
<pre>
Circle area: 78.53981633974483
Rectangle area: 24
</pre>