C# 为什么不能使用removed方法删除genereic列表中的项目？

我有这门课

public class Foo
{
    public Guid Id { get; set; }

    public override bool Equals(object obj)
    {
        Foo otherObj = obj as Foo;

        return otherObj == null && otherObj.Id == this.Id;
    }

    public override int GetHashCode()
    {
        return this.Id.GetHashCode();
    }
}

您可以看到我覆盖了这个对象的Equals和GetHashCode

现在我运行以下代码片段

// Create Foo List
List<Foo> fooList = new List<Foo>();

fooList.Add(new Foo { Id = Guid.NewGuid()});
fooList.Add(new Foo { Id = Guid.NewGuid()});
fooList.Add(new Foo { Id = Guid.NewGuid()});
fooList.Add(new Foo { Id = Guid.NewGuid()});
fooList.Add(new Foo { Id = Guid.NewGuid()});

// Keep Id of last Create
Guid id = Guid.NewGuid();

fooList.Add(new Foo { Id = id });

Console.WriteLine("List Count {0}", fooList.Count);

// Find Foo in List
Foo findFoo = fooList
    .Where<Foo>(item => item.Id == id)
    .FirstOrDefault<Foo>();

if (findFoo != null)
{
    Console.WriteLine("Found Foo");

    // Found Foo now I want to delete it from list
    fooList.Remove(findFoo);
}

Console.WriteLine("List Count {0}", fooList.Count);

运行此操作时，会找到foo，但列表不会删除找到的项

为什么会这样？我认为重写Equals和GetHashCode应该可以解决这个问题

return otherObj == null && otherObj.Id == this.Id;

对吗？难道不是吗

return otherObj != null && otherObj.Id == this.Id;

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哦，听起来好像有人有周一的案子咪咪，办公室