This GeoBlazor sample, written in Blazor for .NET developers, demonstrates the ImageryLayer from the ArcGIS Maps SDK for JavaScript exposed through GeoBlazor's ImageryLayer Razor component, showing two different ways to add the same layer: declaratively in markup and imperatively in C# code. The page shows a 2D light-gray basemap centered over the conterminous United States. Above the map are a text input pre-populated with the URL of the NLCD 2001 Land Cover image service, an Add or Remove Imagery Layer in code button (constructs an ImageryLayer in C# from the input URL and adds it to or removes it from the MapView), and an Add new Imagery Layer in Markup button (toggles a flag that conditionally renders an ImageryLayer element directly inside the Map at 60% opacity). Both buttons are disabled until the view fires OnViewRendered. The sample is intended to demonstrate equivalent declarative and programmatic image-service layering in a Blazor application without writing JavaScript.