Hi @Rabe, Jens,
You can check your
_Imports.razor file in your .client project, make sure it has this line:
@using static Microsoft.AspNetCore.Components.Web.RenderMode
Besides, you can update the Visual Studio to the latest version（my project is 17.9.0 Preview 1.0) , and you can click the Help-->Check for Updates like:
then the "The name 'InteractiveAuto' does not exist in the current context" will disppear:
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