Represents an extension object implementing the DashboardViewer functionality.
Starting with v17.1, we recommend using the ASPxDashboard control or a corresponding ASP.NET MVC extension to display dashboards within web applications. Refer to the following KB articles to learn more about migration to ASPxDashboard / ASP.NET MVC Dashboard:
ASPxDashboardViewer -> ASPxDashboard
MVCxDashboardViewer -> MVCxDashboard