System.ComponentModel.TypeDescriptor.PipelineInitialize C# (CSharp) Method

        private static ICollection PipelineInitialize(int pipelineType, ICollection members, IDictionary cache)
        {
            if (cache != null)
            {
                bool cacheValid = true;

                ICollection cachedMembers = cache[s_pipelineInitializeKeys[pipelineType]] as ICollection;
                if (cachedMembers != null && cachedMembers.Count == members.Count)
                {
                    IEnumerator cacheEnum = cachedMembers.GetEnumerator();
                    IEnumerator memberEnum = members.GetEnumerator();

                    while (cacheEnum.MoveNext() && memberEnum.MoveNext())
                    {
                        if (cacheEnum.Current != memberEnum.Current)
                        {
                            cacheValid = false;
                            break;
                        }
                    }
                }

                if (!cacheValid)
                {
                    // The cache wasn't valid.  Remove all subsequent cache layers
                    // and then save off new data.
                    cache.Remove(s_pipelineMergeKeys[pipelineType]);
                    cache.Remove(s_pipelineFilterKeys[pipelineType]);
                    cache.Remove(s_pipelineAttributeFilterKeys[pipelineType]);
                    cache[s_pipelineInitializeKeys[pipelineType]] = members;
                }
            }

            return members;
        }