Quadrilateral ConvertQuadrilateral(Quadrilateral quadrilateral)
 {
     return(new Quadrilateral(picker.ConvertPointToPickerCoordinates(quadrilateral.TopLeft),
                              picker.ConvertPointToPickerCoordinates(quadrilateral.TopRight),
                              picker.ConvertPointToPickerCoordinates(quadrilateral.BottomLeft),
                              picker.ConvertPointToPickerCoordinates(quadrilateral.BottomRight)));
 }