为什么不使用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();
    }
}

你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 fooList = new List();

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(item => item.Id == id)
    .FirstOrDefault();

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);

当运行此命令时,会找到foo,但列表不会删除找到的项目.

为什么是这样？我认为覆盖Equals和GetHashCode应该解决这个问题？

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

那是对的吗？不应该

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