ASP.NET教程:Ref和Out关键字异同

  /// <summary>
  /// 应用程序的主入口点。
  /// </summary>
  [STAThread]
  static void Main()
  {
   Application.Run(new Form1());
  }

  private void button1_Click(object sender, System.EventArgs e)
  {
   int[] firstArray = {1, 2, 3};
   int[] firstArrayCopy = firstArray;

   this.label1.Text = "Test Passing firstArray reference by value";
   this.label1.Text += "\n\nContents of firstArray before calling FirstDouble:\n\t";
   
   for(int i = 0;i < firstArray.Length; i++)
   {
    this.label1.Text += firstArray[i] + " ";
   }

   FirstDouble(firstArray);

   this.label1.Text += "\n\nContents of firstArray after calling FirstDouble.\n\t";

   for(int i=0;i<firstArray.Length;i++)
   {
    this.label1.Text += firstArray[i] + " ";
   }

   if(firstArray == firstArrayCopy)
    this.label1.Text +="\n\nThe references refer to the same array.\n";
   else
    this.label1.Text +="\n\nThe reference refer to different arrays.\n";

   int[] secondArray = {1, 2, 3};
   int[] secondArrayCopy = secondArray;
   
   this.label1.Text += "\nTest passing secondArray reference by reference.";
   this.label1.Text += "\n\nContents of secondArray before calling SecondDouble:\n\t";

   for(int i=0;i<secondArray.Length; i++)
   {
    this.label1.Text += secondArray[i] + " ";
   }

   SecondDouble(ref secondArray);
   th

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