忽然笑
我感到惊讶的是，我没有读到以前的任何一个答案，我认为这是最关键的方面：当我想要一个没有标识的类型时，我使用structs。例如，3D点：public struct ThreeDimensionalPoint{
public readonly int X, Y, Z;
public ThreeDimensionalPoint(int x, int y, int z)
{
this.X = x;
this.Y = y;
this.Z = z;
}
public override string ToString()
{
return "(X=" + this.X + ", Y=" + this.Y + ", Z=" + this.Z + ")";
}
public override int GetHashCode()
{
return (this.X + 2) ^ (this.Y + 2) ^ (this.Z + 2);
}
public override bool Equals(object obj)
{
if (!(obj is ThreeDimensionalPoint))
return false;
ThreeDimensionalPoint other = (ThreeDimensionalPoint)obj;
return this == other;
}
public static bool operator ==(ThreeDimensionalPoint p1, ThreeDimensionalPoint p2)
{
return p1.X == p2.X && p1.Y == p2.Y && p1.Z == p2.Z;
}
public static bool operator !=(ThreeDimensionalPoint p1, ThreeDimensionalPoint p2)
{
return !(p1 == p2);
}}如果这个结构有两个实例，那么您不关心它们是否是内存中的一个或两个数据。你只关心他们的价值。