Tesselate.Tesselator.GotoState C# (CSharp) Method

        void GotoState(ProcessingState newProcessingState)
        {
            while (this.processingState != newProcessingState)
            {
                /* We change the current state one level at a time, to get to
                * the desired state.
                */
                if (this.processingState < newProcessingState)
                {
                    switch (this.processingState)
                    {
                        case ProcessingState.Dormant:
                            throw new Exception("MISSING_BEGIN_POLYGON");
                        case ProcessingState.InPolygon:
                            throw new Exception("MISSING_BEGIN_CONTOUR");
                        default:
                            break;
                    }
                }
                else
                {
                    switch (this.processingState)
                    {
                        case ProcessingState.InContour:
                            throw new Exception("MISSING_END_CONTOUR");
                        case ProcessingState.InPolygon:
                            throw new Exception("MISSING_END_POLYGON");
                        default:
                            break;
                    }
                }
            }
        }