BlogEngine.Core.Providers.XmlRoleProvider.ReadRoleDataStore C# (CSharp) Method

        private void ReadRoleDataStore()
        {
            lock (this)
            {
                if (!roles.ContainsKey(Blog.CurrentInstance.Id))
                {
                    roles[Blog.CurrentInstance.Id] = new List<Role>();

                    var doc = new XmlDocument();

                    try
                    {
                        doc.Load(this.XmlFullyQualifiedPath);
                        var nodes = doc.GetElementsByTagName("role");
                        foreach (XmlNode roleNode in nodes)
                        {
                            var name = roleNode.SelectSingleNode("name");
                            if (name == null)
                            {
                                continue;
                            }

                            var tempRole = new Role(name.InnerText);
                            var user = roleNode.SelectNodes("users/user");
                            if (user != null)
                            {
                                foreach (XmlNode userNode in user)
                                {
                                    tempRole.Users.Add(userNode.InnerText);
                                }
                            }

                            this.roles[Blog.CurrentInstance.Id].Add(tempRole);
                        }
                    }
                    catch (XmlException)
                    {
                        this.AddUsersToRoles(this.userNames.ToArray(), this.defaultRolesToAdd);
                    }
                }
            }
        }