AssetBundles.AssetBundleManager.Update C# (CSharp) Method

        void Update()
        {
            // Collect all the finished WWWs.
            var keysToRemove = new List<string>();
            foreach (var keyValue in m_DownloadingWWWs)
            {
                WWW download = keyValue.Value;

                // If downloading fails.
                if (download.error != null)
                {
                    m_DownloadingErrors.Add(keyValue.Key, string.Format("Failed downloading bundle {0} from {1}: {2}", keyValue.Key, download.url, download.error));
                    keysToRemove.Add(keyValue.Key);
                    continue;
                }

                // If downloading succeeds.
                if(download.isDone)
                {
                    AssetBundle bundle = download.assetBundle;
                    if (bundle == null)
                    {
                        m_DownloadingErrors.Add(keyValue.Key, string.Format("{0} is not a valid asset bundle.", keyValue.Key));
                        keysToRemove.Add(keyValue.Key);
                        continue;
                    }

                    //Debug.Log("Downloading " + keyValue.Key + " is done at frame " + Time.frameCount);
                    m_LoadedAssetBundles.Add(keyValue.Key, new LoadedAssetBundle(download.assetBundle) );
                    keysToRemove.Add(keyValue.Key);
                }
            }

            // Remove the finished WWWs.
            foreach( var key in keysToRemove)
            {
                WWW download = m_DownloadingWWWs[key];
                m_DownloadingWWWs.Remove(key);
                download.Dispose();
            }

            // Update all in progress operations
            for (int i=0;i<m_InProgressOperations.Count;)
            {
                if (!m_InProgressOperations[i].Update())
                {
                    m_InProgressOperations.RemoveAt(i);
                }
                else
                    i++;
            }
        }