c# 返回多个参数（利用Tuple）

private Tuple<param1, param2> createTup(string name)
{
string param11=name;
string param22=name+"test";

Tuple<param1, param2> tup = new Tuple<param1, param2>(param11, param22);
return tup;
}

var tuptest=createTup(name);
string param1Get=tuptest.Item1;