BExplorer.Shell.SearchCondition.GetSubConditions C# (CSharp) Method

        public IEnumerable<SearchCondition> GetSubConditions()
        {
            // Our list that we'll return
            var subConditionsList = new List<SearchCondition>();

            // Get the sub-conditions from the native API
            object subConditionObj;
            var guid = new Guid(InterfaceGuids.IEnumUnknown);

            HResult hr = NativeSearchCondition.GetSubConditions(ref guid, out subConditionObj);

            if (hr != HResult.S_OK) throw new Exception(hr.ToString());

            // Convert each ICondition to SearchCondition
            if (subConditionObj != null)
            {
                var enumUnknown = subConditionObj as IEnumUnknown;

                IntPtr buffer = IntPtr.Zero;
                uint fetched = 0;

                while (hr == HResult.S_OK)
                {
                    hr = enumUnknown.Next(1, ref buffer, ref fetched);

                    if (hr == HResult.S_OK && fetched == 1)
                    {
                        subConditionsList.Add(new SearchCondition((ICondition)Marshal.GetObjectForIUnknown(buffer)));
                    }
                }
            }

            return subConditionsList;
        }