ZeroInstall.Publish.Capture.SnapshotDiff.CollectProtocolAssocs C# (CSharp) Method

        public void CollectProtocolAssocs([NotNull] CommandMapper commandMapper, [NotNull] CapabilityList capabilities)
        {
            #region Sanity checks
            if (capabilities == null) throw new ArgumentNullException(nameof(capabilities));
            if (commandMapper == null) throw new ArgumentNullException(nameof(commandMapper));
            #endregion

            foreach (string protocol in ProtocolAssocs.Select(protocolAssoc => protocolAssoc.Key))
            {
                using (var protocolKey = Registry.ClassesRoot.OpenSubKey(protocol))
                {
                    if (protocolKey == null) throw new IOException(protocol + " not found");
                    capabilities.Entries.Add(new UrlProtocol
                    {
                        ID = protocol,
                        Descriptions = {RegistryUtils.GetString(@"HKEY_CLASSES_ROOT\" + protocol, valueName: null, defaultValue: protocol)},
                        Verbs = {GetVerb(protocolKey, commandMapper, "open")}
                    });
                }
            }
        }
    }

        private static CapabilityList GetCapabilityList(CommandMapper commandMapper, SnapshotDiff diff)
        {
            var capabilities = new CapabilityList {
                OS = OS.Windows
            };
            string appName = null, appDescription = null;

            diff.CollectFileTypes(commandMapper, capabilities);
            diff.CollectContextMenus(commandMapper, capabilities);
            diff.CollectAutoPlays(commandMapper, capabilities);
            diff.CollectDefaultPrograms(commandMapper, capabilities, ref appName);

            var appRegistration = diff.GetAppRegistration(commandMapper, capabilities, ref appName, ref appDescription);

            if (appRegistration != null)
            {
                capabilities.Entries.Add(appRegistration);
            }
            else
            { // Only collect URL protocols if there wasn't already an application registration that covered them
                diff.CollectProtocolAssocs(commandMapper, capabilities);
            }

            return(capabilities);
        }