Having a few Databases for example:

• DB_EN

• DB_FR

• DB_DE

.

So I created something to get the correct Database by countryCode :

using (var context = new ApplicationContext(_DbContextConfigurationService.GetConnectionString(countryCode)))
{
    return await context
        .Set<T>()
        .Where(expression)
        .FirstOrDefaultAsync();
}

I do this now for every action (CRUD), using the using statement and creating a new ApplicationContext.

The question is, is there a more proper way to get the correct Database by countryCode (maybe in the constructor? And is "using" needed? Because when I see the Microsoft documentation they are not using it.

I also plan to add a UoW layer. Hope it's a bit clear what I mean.