如何在C＃中爲類定義Console.WriteLine行爲？

Question

我有一個類：

class Rect{ 
    int x; 
    int y; 
    public Rect(int x, int y){ 
     this.x = x; 
     this.y = y; 
    } 

} 

我想這一點：

Console.WriteLine(new Rect(12,12)); 
>>> <Rect with x=12, y=12> 

我怎麼能這樣做呢？

Answer 1

您可以覆蓋ToString()方法：

class Rect{ 
    int x; 
    int y; 
    public Rect(int x, int y){ 
     this.x = x; 
     this.y = y; 
    } 

    public override string ToString() 
    { 
     return "("+x.ToString()+","+y.ToString()+")"; 
    } 

} 

Answer 2

Console.WriteLine Method (Object)

您需要從Object覆蓋ToString()方法。