/// <summary>
/// Gets a list of entities of the given type from the database.
/// </summary>
/// <param name="orderBy">The order by expression to run at the database level. It supports only one property.</param>
/// <param name="desc">Specified whether the order by is descending.</param>
public static IEnumerable <T> GetList <T>(Expression <Func <T, bool> > criteria, Expression <Func <T, object> > orderBy, bool desc = false) where T : IEntity
{
return(GetList <T>(criteria, QueryOption.OrderBy <T>(orderBy, desc)));
}
/// <summary>
/// Find an object with the specified type from the database.
/// When used with no criteria, returns the first object found of the specified type.
/// If not found, it returns null.
/// </summary>
/// <param name="orderBy">The order by expression to run at the database level. It supports only one property.</param>
/// <param name="desc">Specified whether the order by is descending.</param>
public static T Find <T>(Expression <Func <T, bool> > criteria, Expression <Func <T, object> > orderBy, bool desc = false) where T : IEntity
{
return(GetList <T>(criteria, QueryOption.OrderBy <T>(orderBy, desc), QueryOption.Take(1)).FirstOrDefault());
}