Error compiling: The type or namespace name 'Razor' does not exist in the namespace 'RazorLight'...

Describe the bug When attempting to compile a string template and a complex model, we get the error:

Failed to compile generated Razor template:
- (3:29) The type or namespace name 'Razor' does not exist in the namespace 'RazorLight' (are you missing an assembly reference?)

To Reproduce

• .Net Framework 4.7.2
• Project is an ASP.NET solution with .cshtml views, which work fine
• Use a non-trivial string template with references to C# POCOs (a simple “Hello World” string works fine)

Expected behavior

• The CompileRenderStringAsync() function returns the result

Information (please complete the following information):

• OS: Windows 10 (dev environment)
• Platform: .NET Framework 4.7.2
• RazorLight version: 2.0.0-rc.3 (latest)
• Are you using the OFFICIAL RazorLight package? https://www.nuget.org/packages/razorlight (I installed it with Package Manager as recommended on your main page)
• Visual Studio version: VS Professional 2019 Version 16.8.2 (latest)

Additional context Clearly the library is referenced - there would be no way to call the .CompileRenderStringAsync() method otherwise. And it does build and compile fine.

I tried these things:

1. Added the <PropertyGroup> settings you mentioned (all of them) in the ASP.NET .csproj file. It didn’t change anything - and also those might apply only to .Net Core?

I don’t think this is an issue with your library necessarily - it’s just unclear how to figure this out.

[GiantCaiB]

This issue caused by .SetOperatingAssembly(typeof(OurWebApp.Data.Order).Assembly)

If your model is dynamic object, it will give you above errors. Be careful if you just simply remove this, RazorLightEngine.Build() will try to get the Assembly Assembly assembly = operatingAssembly ?? Assembly.GetEntryAssembly(); RoslynCompilationService compilationService = new RoslynCompilationService(referenceManager, assembly);

This will cause null value exception if you run your code in unit test and cross projects.

[jbaumbach]

Well, that sounds pretty complicated but glad you got to the bottom of it. Let me know when build RazorLight 2.0.0-rc.4 is ready and I’ll check it out.