Isolated storage

 using System.IO.IsolatedStorage;
 .....
 IsolatedStorageSettings appSettings
    = IsolatedStorageSettings.ApplicationSettings;
 appSettings["Agent"] = "Longtarin";
 appSettings["ID"] = 15;      // ou : appSettings.Add("ID", 15);
 appSettings.Save();





 IsolatedStorageSettings appSettings
    = IsolatedStorageSettings.ApplicationSettings;
 string agent = appSettings["Agent"].ToString();
 int id = (int)appSettings["ID"];









 Imports System.IO.IsolatedStorage
 .....
 Dim appSettings As IsolatedStorageSettings _
    = IsolatedStorageSettings.ApplicationSettings
 appSettings("Agent") = "Longtarin"
 appSettings("ID") = 15
 appSettings.Save()
 .....
 Dim n As Integer = appSettings("Année")







 using System.IO.IsolatedStorage;
 ..... 
 IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();
 string[] ts = isf.GetFileNames();
 foreach (string s in ts) .....













 using System.Text            // pour UTF8Encoding
 .....
 IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();
 IsolatedStorageFileStream  fs = isf.CreateFile("Fich.dat");
 string s = "Fichier créé le " + DateTime.Now.ToShortDateString()
            + " à " + DateTime.Now.ToLongTimeString();
 // conversion de string en byte[]
 UTF8Encoding enc = new UTF8Encoding();
 fs.Write(enc.GetBytes(s), 0, s.Length);
 fs.Close();















 IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();
 IsolatedStorageFileStream fs = isf.OpenFile("Fich.dat", System.IO.FileMode.Open);
 int N = (int)fs.Length;           // taille du fichier
 byte[] tb = new byte[N];          // tableau de réception
 fs.Read(tb, 0, N);
 // convertir tb en une chaîne de caractères
 UTF8Encoding enc = new UTF8Encoding();
 string s = enc.GetString(tb, 0, tb.Length);












 Private Sub bEcrire_Click(ByVal sender As System.Object, _
                           ByVal e As System.Windows.RoutedEventArgs)
  Dim isf As IsolatedStorageFile =_
      IsolatedStorageFile.GetUserStoreForApplication()
  Dim fs As IsolatedStorageFileStream = isf.CreateFile("Fichvb.dat")
  Dim s As String = "Fichier créé le " & DateTime.Now.ToShortDateString()
                    & " à " _& DateTime.Now.ToLongTimeString()
  Dim enc As New UTF8Encoding
  fs.Write(enc.GetBytes(s), 0, s.Length)
  fs.Close()
 End Sub

 Private Sub bLire_Click(ByVal sender As System.Object, _
                         ByVal e As System.Windows.RoutedEventArgs)
  Dim isf As IsolatedStorageFile 
      = IsolatedStorageFile.GetUserStoreForApplication()
  Dim fs As IsolatedStorageFileStream = isf.OpenFile("Fichvb.dat",_
                                                     System.IO.FileMode.Open)
  Dim N As Integer = CInt(Fix(fs.Length)) ' taille du fichier
  Dim tb(N - 1) As Byte ' tableau de réception
  fs.Read(tb, 0, N)
  ' convertir tb en une chaîne de caractères
  Dim enc As New UTF8Encoding()
  Dim s As String = enc.GetString(tb, 0, tb.Length)
 End Sub












 using System.IO.IsolatedStorage;
 using System.IO;



 IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();
 IsolatedStorageFileStream isfs
    = new IsolatedStorageFileStream("App.dat", FileMode.Create, isf);
 StreamWriter sw = new StreamWriter(isfs);
 sw.WriteLine("Première ligne"); sw.WriteLine("Deuxième ligne");
 sw.Close(); isfs.Close();






 IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();
 IsolatedStorageFileStream isfs = isf.OpenFile("App.dat", FileMode.Open);
 StreamReader sr = new StreamReader(isfs);
 string s1 = sr.ReadLine();
 string s2 = sr.ReadLine();
 sr.Close(); isfs.Close();








Lire des fichiers distants


using System.Net;
 using System.IO;
 .....
 WebClient client = new WebClient();
 client.OpenReadCompleted 
    += new OpenReadCompletedEventHandler(client_OpenReadCompleted);
 client.OpenReadAsync(new Uri("Fich.txt", UriKind.Relative));
 .....
 void client_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
 {
  StreamReader sr = new StreamReader(e.Result);
  string s = sr.ReadLine();
  while (s != null)
  {
   .....            // contenu de la ligne dans s
   s = sr.ReadLine();
  }
 }
















 
Lire des fichiers locaux


 using System.IO;
 using System.Text;
 .....
 OpenFileDialog ofd = new OpenFileDialog();
 ofd.Filter = "Fichiers de texte|*.txt";
 if (ofd.ShowDialog() == DialogResult.OK)
 {
  Stream str = ofd.SelectedFile.OpenRead();
  int N = (int)str.Length;       // taille du fichier de texte
  byte[] tb = new byte[N];
  str.Read(tb, 0, N);            // lire tout le contenu du fichier
  // amener le contenu du fichier local dans une variable de type string
  s = UTF8Encoding.UTF8.GetString(tb, 0, N);
  str.Close();
 }



 StreamReader sr = ofd.SelectedFile.OpenText();
 s = sr.ReadToEnd();
 sr.Close();











Les fichiers en ressources


 using System.Windows.Resources;
 using System.IO;
 .....
 StreamResourceInfo sri = Application.GetResourceStream(
       new Uri("SLProg;component/SLRes.txt", UriKind.Relative));
 StreamReader sr = new StreamReader(sri.Stream);
 string s1 = sr.ReadLine();
 string s2 = sr.ReadLine();