Private Function LoadData(ByVal fileName As String) As String
        Dim data As String = String.Empty
        Dim isfstream As New IsolatedStorageFileStream(fileName, FileMode.Open, IsolateStorageFileObj)
        Dim sr As New StreamReader(isfstream)
        data = sr.ReadLine()
        Return data
  End Function
 
This is code snippet in vb.net to store and fetch the data from isolated storage.
  
Imports System.IO
Imports System.IO.IsolatedStorage
 
 'IsolatedStorageFile.GetUserStoreForApplication() function get the isolated storage for the application 
  Private IsolateStorageFileObj As IsolatedStorageFile = IsolatedStorageFile.GetUserStoreForApplication()
 
  Private Sub SaveDatabtn_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
        'Calls the Save data function to save the input text in IsolatedStorage.txt file 
        SaveData(InputDataTxt.Text, "IsolatedStorage.txt")
  End Sub
 
  Private Sub GetDatabtn_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
        Dim Data As String = String.Empty
        Data = LoadData("IsolatedStorage.txt")
        'Gets the data from the isolated storage and show 
        MessageBox.Show(Data)
  End Sub
 

  This is the function to save the data in the isolated storage
 
Private Sub SaveData(ByVal data As String, ByVal fileName As String)
        Dim isfstream As New IsolatedStorageFileStream(fileName, FileMode.Create, IsolateStorageFileObj)
        'Delete if the file already exists 
        If IsolateStorageFileObj.FileExists(fileName) = True Then
            IsolateStorageFileObj.DeleteFile(fileName)
        End If
        Dim sw As New StreamWriter(isfstream)
        sw.Write(data)
        sw.Close()
  End Sub