c# - IEqualityComparer 与 EqualityComparer？

Question

我读过这个post但它没有回答我的问题。

MSDN says :

We recommend that you derive from the EqualityComparer(Of T) class instead of implementing the IEqualityComparer(Of T) interface, because the EqualityComparer(Of T) class tests for equality using the IEquatable(Of T).Equals method instead of the Object.Equals method.

但是如果我看一下实现，它们都使用通用类型:

 public class AAA:IEqualityComparer<Box>
    {
        public bool Equals(Box x, Box y)
        {
        }

        public int GetHashCode(Box obj)
        {
        }
    }

    public class BBB : EqualityComparer<Box>
    {
        public override bool Equals(Box x, Box y)
        {
        }

        public override int GetHashCode(Box obj)
        {
        }
    }

我错过了什么？

Answer 1

我认为 other post你提到的是说 EqualityComparer<Box>工具 IEqualityComparer<Box>和 IEqualityComparer ，因此如果您从 EqualityComparer<Box> 派生，则不必同时实现通用接口(interface)和非通用接口(interface).