C# dictionary 自定义类型的containkey 方法实现

C# dictionary 自定义类型的containkey 方法实现

​​​https://docs.microsoft.com/zh-cn/dotnet/api/system.collections.generic.dictionary-2?view=netframework-4.7.2​​​

public class myVectorEqualityComparer : IEqualityComparer<MyVector3>
{
    public bool Equals(MyVector3 x, MyVector3 y)
    {
        if (System.Object.ReferenceEquals(x, y)) return true;
        if (System.Object.ReferenceEquals(x, null) || System.Object.ReferenceEquals(y, null))
            return false;
        return x.x.Equals(y.x) && x.y.Equals(y.y) && x.z.Equals(y.z);
    }

    public int GetHashCode(MyVector3 obj)
    {
        if (System.Object.ReferenceEquals(obj, null)) return 0;
        return obj.x.GetHashCode() ^ obj.y.GetHashCode() ^ obj.z.GetHashCode();
    }


}
[Serializable]
public class MyVector3
{
    public float x;
    public float y;
    public float z;

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

}


 void Start()
   {
      var myVectorEqualityComparer boxEqC = new myVectorEqualityComparer();
  }