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I've seen a bunch of tutorials on Youtube where they just run a ASP.NET template project, and the hot reload button shows up next to the 'Start Without Debugging' button on the top panel. I do not know why this is not happening for me, the button is just not there. I installed VS 2022 just recently (in mid-July 2022) and the project is using .NET 6. What should I do?

VS 2022 F# project toolbar

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  • Maybe the hot reload feature is C# only? It shows up in a C# project, but not in the F# project. Commented Jul 20, 2022 at 12:18
  • I fixed this issue by opening the sln file instead of the csproj file. But I have minimal knowledge about the meaning of these files - maybe your issue is a similar config issue. You could try creating the project from scratch. Commented Oct 22, 2022 at 22:33

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As you mentioned in the comments, F# does not support Hot Reloading according to the documentation (I am guessing you are working in an F# project by the sounds of it). Here are the unsupported scenarios:

  • Xamarin.Forms apps won’t support .NET Hot Reload in iOS and Android scenarios. You get partial support for Hot Reload when targeting a UWP app. This is by design, and we don’t expect to make any further improvements. (Note: XAML Hot Reload will continue to be available and supported for Xamarin.Forms customers on the latest SDK.)
  • .NET MAUI apps are not supported prior to Visual Studio 2022 version 17.1 Preview 1. Starting in 17.1 Preview 1, .NET MAUI is supported, but only with the debugger attached.
  • Apps built using F# or those targeting .NET Native do not support Hot Reload.

Aside from that, if you still don't see the icon, check your toolbar settings.

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Hmm, it says that it does not support .NET Native apps with F#. But is the ASP.NET project really a .NET Native one?
@MarkoGrdinić can you add a screenshot of your toolbar to your post? An ASP.NET project should really have Hot Reload available - my ASP.NET Web API project has it (it uses .NET Framework).
Done. As I said, it does not show up in the F# project, but the flame icon is there in a C# one. I am don't know if it doesn't shows up in regular F# projects, so far I've only tried an ASP.NET MVC project in VS 2022.
@MarkoGrdinić Interestingly, if I create a new F# project (console app), the hot reload is not in the toolbar. But if I add to the solution a .NET Core C# Web API project, the icon appears. But I expect it will work with the Web API project only.

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