Compact parameter validation

Validate your parameters with minimal code using AT.Core.Argument

// Instead of writing this:
if (arg1 == null)
{
     throw new ArgumentNullException("arg1", "argument can not be null");
}

if (arg2 == null)
{
     throw new ArgumentNullException("arg2", "argument can not be null");
}

if (arg3 == null)
{
     throw new ArgumentNullException("arg3", "argument can not be null");
}

// Use this simplification instead:
Argument.NotNull(() => arg1, () => arg2, () => arg3);

EF Multiple Result Sets

Execute SQL queries with multiple result sets using AT.Data.DbContextExtensions

Tuple<IEnumerable<Person>, IEnumerable<Car>> results = context.MultipleResultSet(peopleQuery, carQuery);

MultipleResultQuery<Person> peopleQuery = (from p in context.People
                                           where p.Age > age
                                           select p).AsMultipleResultQuery();

MultipleResultQuery<Car> carQuery = (from c in context.Cars
                                     where c.HorsePower > horsePower
                                     select c).AsMultipleResultQuery();

// Single database round trip
context.MultipleResultSet(peopleQuery, carQuery);

IEnumerable<Person> peopleResults = peopleQuery.Results;
IEnumerable<Car> carResults = carQuery.Results;