/// <summary> /// Change an object's color based on it's handle /// </summary> public static bool SetColor(Document document, string handle, int red, int green, int blue) { if (document == null) { return(false); } if (string.IsNullOrEmpty(handle)) { return(false); } var db = document.AcDocument.Database; // And attempt to get an ObjectId for the Handle var id = DocumentContext.GetObjectId(db, handle); using (var ctx = new DocumentContext(document.AcDocument)) { var selected = (Entity)ctx.GetTransaction().GetObject(id, OpenMode.ForWrite, false, true); selected.Color = Color.FromRgb((byte)red, (byte)green, (byte)blue); } return(true); }