Silverlight

namespace FileDemo
{

    public partial class Page : UserControl
    {
        private string contents;
 
        public Page()
        {
            InitializeComponent();
        }
 
        private void btnSelect_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog odlg = new OpenFileDialog();
            odlg.Filter = "Text files|*.txt";
            odlg.Multiselect = false;
            if((bool)odlg.ShowDialog())
            {
                StreamReader reader= new StreamReader(odlg.File.OpenRead());
                while (!reader.EndOfStream)
                {
                    contents = reader.ReadToEnd();
                }
                txtContents.Text = contents;
                reader.Close();
            }
        }
    }
}

string naslov=@"C:\\text.txt";
StreamReader reader= new StreamReader(naslov);
while(!reader.EndOfStream())
{
   ...
}