将元组初始化为空元组-
Tuple<string, string> myTuple;
如果要检查元组中的值,则该值是否为null-
using System; namespace Demo { class Program { static void Main(string[] args) { Tuple <int, string> tuple = new Tuple<int, string>(10, null); if (tuple.Item1 == 10) { Console.WriteLine(tuple.Item1); } if (tuple.Item2 == null) { Console.WriteLine("Item is null"); } } } }