New lines worked fine in 10.2.3, but lock up the map control in 10.2.4
It can be recreated using the samples, by editing TextSymbol.xaml.cs, and adding the following line of code to AcceptPointsAsync:
var symbol = _symbols[symbolCombo.SelectedIndex];
symbol.Text += Environment.NewLine + "Second line";
graphicsOverlay.Graphics.Add(new Graphic(point, symbol));
Is there a workaround to allow text across multiple line?