File Class

Private Sub OpenFile_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)

    If Application.Current.HasElevatedPermissions Then
    
        ' fileLoc is a global string variable.
        fileLoc = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "MyDoc.txt")

        ' Create the file if it does not exist.
        If Not File.Exists(fileLoc) Then
            Using swNew As New StreamWriter(fileLoc)
                swNew.WriteLine("Sample text")
            End Using
        End If

        ' Display the contents in a TextBox.
        Using sr As New StreamReader(fileLoc)
            inputData.Text = sr.ReadToEnd()
            inputData.Visibility = Visibility.Visible
        End Using
    End If
End Sub

private void OpenFile_Click(object sender, RoutedEventArgs e)
{

    if (Application.Current.HasElevatedPermissions)
    {
        // fileLoc is a global string variable.
        fileLoc = System.IO.Path.Combine(Environment.GetFolderPath(
           Environment.SpecialFolder.MyDocuments), "MyDoc.txt");

        // Create the file if it does not exist.
        if (!File.Exists(fileLoc))
        {
            using (StreamWriter swNew = new StreamWriter(fileLoc))
            {
                swNew.WriteLine("Sample text");
            }
        }

        // Display the contents in a TextBox.
        using (StreamReader sr = new StreamReader(fileLoc))
        {
            inputData.Text = sr.ReadToEnd();
            inputData.Visibility = Visibility.Visible;
        }
    }
}