CodeTV.GraphBuilderPlayer.UnRender C# (CSharp) Method

        private void UnRender(IPin pinOutOrigin)
        {
            int hr;
            //hr = pinOutOrigin.Disconnect();
            IPin pinOutEnd = null;
            hr = pinOutOrigin.ConnectedTo(out pinOutEnd);
            if (pinOutEnd != null)
            {
                try
                {
                    PinInfo pInfo = new PinInfo();
                    hr = pinOutEnd.QueryPinInfo(out pInfo);
                    if (hr >= 0)
                    {
                        if (pInfo.filter != null)
                        {
                            try
                            {
                                IEnumPins ppEnum;
                                hr = pInfo.filter.EnumPins(out ppEnum);
                                if (hr >= 0)
                                {
                                    try
                                    {
                                        // Walk the pins looking for a match
                                        IPin[] pPins = new IPin[1];
                                        //22 int lFetched;
                                        //22 while ((ppEnum.Next(1, pPins, out lFetched) >= 0) && (lFetched == 1))
                                        while (ppEnum.Next(1, pPins, IntPtr.Zero) >= 0)
                                        {
                                            try
                                            {
                                                // Read the direction
                                                PinDirection ppindir;
                                                hr = pPins[0].QueryDirection(out ppindir);
                                                if (hr >= 0)
                                                {
                                                    // Is it the right direction?
                                                    if (ppindir == PinDirection.Output)
                                                    {
                                                        if (pPins[0] != null)
                                                        {
                                                            UnRender(pPins[0]);
                                                        }
                                                    }
                                                }
                                            }
                                            finally
                                            {
                                                Marshal.ReleaseComObject(pPins[0]);
                                            }
                                        }
                                    }
                                    finally
                                    {
                                        Marshal.ReleaseComObject(ppEnum);
                                    }
                                }

                                hr = graphBuilder.RemoveFilter(pInfo.filter);
                            }
                            finally
                            {
                                Marshal.ReleaseComObject(pInfo.filter);
                            }
                        }
                    }
                }
                finally
                {
                    Marshal.ReleaseComObject(pinOutEnd);
                }
            }
        }