Setting DrwingQuality to HighSpeed cause drawing problem as attached picture
ShapeFileFeatureLayer shpFeatureLayer = new ShapeFileFeatureLayer(MapGlobals.mapFiles.mapFileName); shpFeatureLayer.RequireIndex = true;
shpFeatureLayer.DrawingMarginPercentage = 50;
shpFeatureLayer.DrawingQuality = DrawingQuality.HighSpeed;