T＆gt;关于比较列表474上的问题; [英] A question about comparing List<T>

问题描述

我有两个列表：

List<comparerobj> list_c = new List<comparerobj>();
List<comparerobj> list_b = new List<comparerobj>();

我正在填充列表莫名其妙

i'm filling lists somehow

然后我试图找到这list_c犯规含有list_b元素：

then i'm trying to find elements in list_b which list_c doesnt contain:

foreach (comparerobj b in list_b)
{
    bool lc = !list_c.Contains(b);
    if (lc != true)
    {
        data.Add(b);
    }
}

但对于以下b我理解的LC = TRUE。我究竟做错了什么？

but for any b i'm getting that lc = true. what am i doing wrong?

推荐答案

如何你的对象进行比较？默认情况下.NET框架，参考比较的对象。例如，如果您创建下面的类：

How your objects are compared? By default .NET framework compares objects by references. For Example if you create following class:

class A
{
    string Name { get; set; }
}

和follwing code

and follwing code

A a1 = new A() { Name = "a" };
A a2 = new A() { Name = "a" };

那么你会发现，这些对象是不同的。

then you will find that these objects are different.

您需要重写等于方法用于.NET Framework对待上述宗旨，平等的。

You need to override Equals method for .NET Framework to treat above objects as equal.

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