var tupledata=("你好",1,2) ;//最简单的声明方法 

Tuple<int,string> tuple=new Tuple<int, string>(1,"你好");//最正式的声明

int a = tuple.Item1;string b = tuple.Item2;

var tup = (name: 1, age: 2);Console.WriteLine(tup.Item1);   //之前的调用方法依然是可用的Console.WriteLine(tup.age);

static (int, string) returnTuple() => (1, "你好");

var result =returnTuple();
Console.WriteLine(result.Item1);
Console.WriteLine(result.Item2)

  struct MyStruct    { 
public int id; 
public string name;   
 }

MyStruct test = new MyStruct{ 
           id = 1,           
 　　　　　　name = "小艺"       
 };