Hi Steve!

Thank you for your response.

The thing is that only small parts of the documentation will be updated between different system versions, so to make a complete copy seems a bit to much?

My current situation is that I have a document type that defines nested content and have VersionFrom, VersionTo and Text fields. Whenever updating the documentation I can now just add a new instance of the nested document type and define from what version this will be available. (This setup makes it possible to add some text in a new part, without having to remove the older text, having them visible simultaneously.) I have then created a custom function that parses the v URL attribute and shows/hides different parts of the documentation accordingly.

Current code...

    @{
        foreach (var p in Model.Description)
        {
            if (MyLogic.CheckVersion(Request.QueryString["v"], (p.VersionFrom as ContentModels.Version)?.VersionName, (p.VersionTo as ContentModels.Version)?.VersionName))
            {
                @p.Text
            }
        }
    }

This all works fine in my dev environment - static class in /App_Data/MyLogic.cs, with a CheckVersion() method, which I refer in my razor like above. p being of my nested content document type. But when I drop my MyLogic.cs file into the prod environment App_Data folder it never recognizes it and I receive the following error:

CS0103: The name 'MyLogic' does not exist in the current context

What am I missing?

I just realized my own mistake - placing the code in the App_Data folder instead of App_Code. Moving the code file to the correct location solved my problem.