System.ComponentModel.DebugTypeDescriptor.Refresh C# (CSharp) Method

        public static void Refresh(Type type) {

            if (type == null) {
                return;
            }

            // We only fire the change event if we have cached the componet.
            // Since we will recreate the cache entry if anyone has asked for
            // this component... this prevents getting tons of duplicate
            // Refresh events.
            //
            bool found = false;
            
            lock (cachedComponentEntries) {
                
                ArrayList removeItems = null;

                // find all the instances of the requested type
                // and any types that derive from it,
                // and remove them.
                //
                foreach (Type cacheType in cachedComponentEntries.Keys) {
                    if (type.IsAssignableFrom(cacheType)) {
                        if (removeItems == null) {
                            removeItems = new ArrayList();
                        }
                        removeItems.Add(cacheType);
                    }
                }

                if (removeItems != null) {
                    foreach (Type t in removeItems) {
                        // Remove the item from the cache, it will get recreated
                        // on demand.
                        //
                        cachedComponentEntries.Remove(t);
                    }
                    found = true;
                }
            }

            if (found) {
            
                // Clear the attribute cache.  It's not that expensive to build
                // this back up if we need to.
                //
                lock(attributeCache) {
                    attributeCache.Clear();
                }
                
                RefreshEventHandler handler = refreshHandler;
            
                // Notify listeners of the change
                //
                if (handler != null) {
                    handler(new RefreshEventArgs(type));
                }
            }
        }