EF Linq Error after change from dotnet Core 2.2.6 to 3.0.0

Question

I\'m trying to upgrade a solution to the new Core Framework 3.0.0. Now I\'m having a small issue I don\'t understand.

Look, this method was unproblematic in 2.2.6:

Answer 1

As Daniel Hilgarth wrote his solution is fine and works. The Addition of Wiktor Zychla seems to work, too. I rewrote the method as follows:

public async Task> GetBirthdayUsersCurrentMonth()
    {
        return await ApplicationDbContext.Users
            .Where(x => x.Gender != ApplicationUser.GenderTypes.generic)
            //.Where(x => x.BirthDate.GetValueOrDefault().Month == DateTime.Now.Month)
            .Where(x => x.BirthDate.Value.Month == DateTime.Now.Month)
            .Where(x => x.RetireDate == null)
            .OrderBy(x => x.BirthDate)
            .ToListAsync();
    }

So, as it seems in Core 3.0.0 it's not a good idea to use as mentioned evaluation-methods event if these are standard methods served by the classes itself.

Thanks for your help.