public void AddNewGroup()
{
base.ThrowIfCannotActAsOwner();
string text = ((string)base.GetParameter("SB")).Trim();
if (text.Length == 0)
{
throw new OwaEventHandlerException("User did not provide name for new group", LocalizedStrings.GetNonEncoded(-1749891264), true);
}
NavigationNodeGroupSection navigationNodeGroupSection = (NavigationNodeGroupSection)base.GetParameter("GS");
NavigationNodeCollection navigationNodeCollection = NavigationNodeCollection.TryCreateNavigationNodeCollection(base.UserContext, base.UserContext.MailboxSession, navigationNodeGroupSection);
NavigationNodeGroup navigationNodeGroup = NavigationNodeCollection.CreateCustomizedGroup(navigationNodeGroupSection, text);
Guid navigationNodeGroupClassId = navigationNodeGroup.NavigationNodeGroupClassId;
navigationNodeCollection.Add(navigationNodeGroup);
navigationNodeCollection.Save(base.UserContext.MailboxSession);
navigationNodeCollection = NavigationNodeCollection.TryCreateNavigationNodeCollection(base.UserContext, base.UserContext.MailboxSession, navigationNodeGroupSection);
navigationNodeGroup = navigationNodeCollection[navigationNodeCollection.FindGroupById(navigationNodeGroupClassId)];
NavigationGroupHeaderTreeNode navigationGroupHeaderTreeNode = new NavigationGroupHeaderTreeNode(base.UserContext, navigationNodeGroup);
NavigationGroupHeaderTreeNode navigationGroupHeaderTreeNode2 = navigationGroupHeaderTreeNode;
navigationGroupHeaderTreeNode2.CustomAttributes += " _NF=1";
this.Writer.Write("<div id=ntn>");
navigationGroupHeaderTreeNode.RenderUndecoratedNode(this.Writer);
this.Writer.Write("</div>");
}