It would be nice, if you could define your own mapping for the async-to-sync function conversion.

Example:

NHibernate.Linq.LinqExtensionMethods.ToListAsync=System.Linq.Enumerable.ToList

Currently, this source code generator tries to use NHibernate.Linq.LinqExtensionMethods.ToList, which doesn't exist and requires to write your own class, like:

namespace NHibernate.Linq;

internal static class LinqExtensionMethods
{
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static List<T> ToList<T>(IQueryable<T> query)
        => query.ToList();
}

This, however, comes with its own problems:

• Complaints that the namespace doesn't match the directory structure/root namespace of the project
• Warning CS0436, because there is a static class in both the NHibernate assembly and your own project

The mapping could be stored in a file included with AdditionalFiles, like the CsWin32 project does.