C#中的元组

参考链接：
https://docs.microsoft.com/zh-cn/dotnet/csharp/language-reference/builtin-types/value-tuples
https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/builtin-types/value-tuples
https://docs.microsoft.com/zh-cn/dotnet/api/system.valuetuple-2?view=net-6.0
https://www.cnblogs.com/aixinjueluo/articles/9961899.html
https://www.cnblogs.com/unity3ds/p/11641582.html