I'm using the WPF control (10.2.7) and have a layer with about 180,000 graphic items. The graphic items are all simple Polylines about 1m in length. The layer is only displayed when the scale is < 1250. If I add any attributes to the 180,000 Graphic items it makes the control very unstable and it randomly crashes when zooming in. I can see the control is using about 1Gb of memory and I assume the random crashes are somehow memory related. I tried splitting the 180,000 items across multiple GraphicsLayers but I get the same random crashes. Any advise for fixing this issue?