At WPF ESRI, we can add picture to the coordinate ,but we can not add with user control And I want to add "user control" to specify place at runtime. I hope that you understood what I mean.
BitmapImage Bi = new BitmapImage(new Uri(st));
PictureMarkerSymbol pms = new PictureMarkerSymbol()
{
Source = Bi
};
var graphic = new Graphic() { Geometry = new MapPoint(x, y) };
graphic.Symbol = pms;
MarkerGraphicsLayer.Graphics.Add(graphic);