C# 方法多個返回值

1.   6.0出來了新的語法 Tuple 支付返回多個值

　

class Demo
{
public void Run()
{
var num = Exec(5, 6);
Console.WriteLine(num.Item1); //第一個返回值
Console.WriteLine(num.Item2); //第二個返回值

Console.WriteLine();
var num2 = Exec2(5, 6);
Console.WriteLine(num2.Item1); //第一個返回值
Console.WriteLine(num2.Item2); //第二個返回值
Console.WriteLine(num2.Item3); //第三個返回值
}

public Tuple<int, int> Exec(int a, int b)
{
Tuple<int, int> tup = new Tuple<int, int>(a + b, a * b);
return tup;
}

public Tuple<int, int, int> Exec2(int a, int b)
{
Tuple<int, int, int> tup = new Tuple<int, int,int>(a + b, a * b, a - b);
return tup;
}

}

2.  KeyValuePair