为了确保平等正常运行，结构中需要覆盖哪些内容? [英] What needs to be overridden in a struct to ensure equality operates properly?

问题描述

正如标题所述:我是否需要覆盖==运算符? .Equals()方法怎么样?我有什么想念吗?

As the title says: do I need to override the == operator? how about the .Equals() method? Anything I'm missing?

推荐答案

来自msdn的示例

public struct Complex 
{
   double re, im;
   public override bool Equals(Object obj) 
   {
      return obj is Complex && this == (Complex)obj;
   }
   public override int GetHashCode() 
   {
      return re.GetHashCode() ^ im.GetHashCode();
   }
   public static bool operator ==(Complex x, Complex y) 
   {
      return x.re == y.re && x.im == y.im;
   }
   public static bool operator !=(Complex x, Complex y) 
   {
      return !(x == y);
   }
}

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