Using Multiple Pages in NopCommerce Admin Plugin

I am writing a plugin which has multiple pages such as Add.csthml, Configure.csthml and so on. And Configure.cshtml has  link to Add.cshtml. But nopCommerce uses Html.Action to render the page inside its another page. It works for Configure.cshtml since it is the first page nopCommerce calls when user clicks on the Configure link but how can I allow people to navigate Add.cshtml in this case? They will reach Add.cshtml using the link on Configure.cshtml.

You could add a route and use:

<a href="@Url.RouteUrl( "Plugin.Widgets.WidgetName.Add)">Add</a>

But it won't be rendered it on the same page right as it is done to Configure.cshtml. If not, then how come I render the Add.cshtml within the Admin master as well?

just add it on configure.cshtml, take a look at how the other plugins deal with this (usually when adding something a modal telerik window is used)