LINQ inner - inner集合不包含字符串

Question

假设我有以下集合：

ONE
- Banana
- Mango

TWO
- Apple
- Mango

THREE
- Orange
- Pear

我只想获取不包含芒果的集合，例如：

THREE
- Orange
- Pear

以下示例返回错误的结果：

List<Order> list = new List<Order> {
                new Order { Id = 1, Name = "ONE", Items = new List<Items> { new Item { Id = 1, Nama = "Banana" }, new Items { Id = 2, Nama = "Mango" } }},
                new Order { Id = 1, Name = "TWO", Items = new List<Items> { new Item { Id = 1, Nama = "Orange" }, new Items { Id = 2, Nama = "Mango" } }},
                new Order { Id = 1, Name = "THREE", Items = new List<Items> { new Item { Id = 1, Nama = "Pear" }, new Items { Id = 2, Nama = "Chery" } }},
            };

var result = list.Where(x => x.Item.Any(y => y.Nama != "Mango")).ToList();

Answer 1

一旦发现不同于“芒果”的"Nama“，Any将立即退出，而这并不是你想要的。

x.Items.All(y => y.Nama != "Mango")

应该做这件事。