test

   1:  using System;

   2:  using System.Windows.Forms;

   3:  using System.IO;

   4:   

   5:  namespace WindowsFormsApplication1

   6:  {

   7:  public partial class Form1 : Form

   8:  {

   9:     public static string InvalidPath ="1:\\invlid_path.txt";

  10:    

  11:     public Form1()

  12:     {

  13:        InitializeComponent();

  14:      }

  15:     

  16:      private void Form1_Load(object sender, EventArgs e)

  17:     {

  18:         MessageBox.Show("Form1_Load 1");

  19:         string s = File.ReadAllText(InvalidPath);

  20:         MessageBox.Show("Form1_Load 2");

  21:       }

  22:   

  23:      private void button1_Click(object sender, EventArgs e)

  24:      {

  25:         string s = File.ReadAllText(InvalidPath);

  26:       }

  27:  }

  28:  }