See dotnet/aspire#1449 for context, but in general there is code like:

<Component OnSomeEvent="DoSomething(context)" />

and the user changed it to:

<Component OnSomeEvent="@DoSomething(context)" />

This seemed to have no effect, but nobody is really sure what the rules are for whether the @ is necessary in this context or not. It would be great if the compiler could warn when it expects a C# expression, and encounters a C# implicit expression.