OleViewDotNet.COMRegistryViewer.LoadLocalServices C# (CSharp) Method

        private void LoadLocalServices()
        {
            List<IGrouping<Guid, COMCLSIDEntry>> clsidsByAppId = m_reg.ClsidsByAppId.ToList();
            IDictionary<Guid, COMAppIDEntry> appids = m_reg.AppIDs;
            Dictionary<string, ServiceController> services;

            try
            {
                services = ServiceController.GetServices().ToDictionary(s => s.ServiceName.ToLower());
            }
            catch (Win32Exception)
            {
                services = new Dictionary<string,ServiceController>();
            }

            List<TreeNode> serverNodes = new List<TreeNode>();
            foreach (IGrouping<Guid, COMCLSIDEntry> pair in clsidsByAppId)
            {   
                if(appids.ContainsKey(pair.Key) && !String.IsNullOrWhiteSpace(appids[pair.Key].LocalService))
                {
                    COMAppIDEntry appidEnt = appids[pair.Key];                    

                    string name = appidEnt.LocalService;

                    if (services.ContainsKey(name.ToLower()))
                    {                       
                        try
                        {
                            ServiceController sc = services[name.ToLower()];

                            string displayName = sc.DisplayName;
                            if (!String.IsNullOrWhiteSpace(displayName))
                            {
                                name = displayName;
                            }                            
                        }
                        catch (Win32Exception)
                        {                            
                        }                        
                    }
                    
                    TreeNode node = new TreeNode(name);

                    StringBuilder builder = new StringBuilder();

                    AppendFormatLine(builder, "AppID: {0}", pair.Key);
                    if (!String.IsNullOrWhiteSpace(appidEnt.RunAs))
                    {
                        AppendFormatLine(builder, "RunAs: {0}", appidEnt.RunAs);
                    }

                    node.ToolTipText = builder.ToString();
                    node.Tag = appidEnt;
                    
                    int count = pair.Count();

                    TreeNode[] clsidNodes = new TreeNode[count];
                    string[] nodeNames = new string[count];
                    int j = 0;

                    foreach(COMCLSIDEntry ent in pair)
                    {                        
                        clsidNodes[j] = CreateClsidNode(ent);
                        nodeNames[j] = ent.Name;
                        j++;
                    }

                    Array.Sort(nodeNames, clsidNodes);
                    node.Nodes.AddRange(clsidNodes);

                    serverNodes.Add(node);
                }
            }

            treeComRegistry.Nodes.AddRange(serverNodes.ToArray());
            Text = "Local Services";
        }