Ref 與 Out的區別在于，數組類型的 ref 參數必須由調用方明確賦值，使用數組類型的 out 參數前必須先為其賦值

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下邊是分別用ref 和Out寫的兩個例子

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using System;

using System.Collections.Generic;

using System.Text;

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namespace ConsoleApplication12

{

???? class Program

???? {

???????? static void Main(string[] args)

???????? {

????????????? int[] myArray =new int [5]{1,2,3,4,5};

????????????? ?FillArray(ref? myArray);

??????????? for (int i=0; i < myArray.Length; i++)??????

???????? ??? Console.WriteLine(myArray[i]);

???????? }

????????

???????? static public void FillArray(ref? int[] myArray)

???????? {

????????????? // Initialize the array:

????????????? myArray[0] = 123;

???????? }

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???? }

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}

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using System;

using System.Collections.Generic;

using System.Text;

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namespace ConsoleApplication12

{

???? class Program

???? {

???????? static void Main(string[] args)

???????? {

????????????? int[] myArray; // Initialization is not required

??????????? FillArray(out myArray);

?????????? for (int i=0; i < myArray.Length; i++)?

???? ??????? Console.WriteLine(myArray[i]);

???????? }

????????

???? ???? static public void FillArray(out int[] myArray)

???????? {

????????????? // Initialize the array:

????????????? myArray = new int[5] { 1, 2, 3, 4, 5 };

???????? }

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???? }

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}

轉載于:https://www.cnblogs.com/AlonaLiu/archive/2008/12/15/1355518.html

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