Windows.Storage.Streams.DataReader.ReadString C# (CSharp) Method

		public string ReadString()
		{
			throw new NotImplementedException();
		}

        async void OnFileOpenButtonClick(object sender, RoutedEventArgs args) {
            FileOpenPicker picker = new FileOpenPicker();
            picker.FileTypeFilter.Add(".txt");
            StorageFile storageFile = await picker.PickSingleFileAsync();

            // If user presses Cancel, result is null
            if (storageFile == null)
                return;

            Exception exception = null;

            try {
                using (IRandomAccessStream stream = await storageFile.OpenReadAsync()) {
                    using (DataReader dataReader = new DataReader(stream)) {
                        uint length = (uint)stream.Size;
                        await dataReader.LoadAsync(length);
                        txtbox.Text = dataReader.ReadString(length);
                    }
                }
            }
            catch (Exception exc) {
                exception = exc;
            }

            if (exception != null) {
                MessageDialog msgdlg = new MessageDialog(exception.Message, "File Read Error");
                await msgdlg.ShowAsync();
            }
        }