public static int GetNextNumber <T>(this LockersDBEntities1 context)
where T : ILockNumberProvider
{
var query = (from item in context.Set <T>
select item.Number)
.DefaultIfEmpty(0)
.Max();
return((int)query + 1);
}
public static int GetNextNumber <T>(
this LockersDBEntities1 context,
Expression <Func <T, int> > getNumberExpression)
{
var query = (from item in context.Set <T>
select getNumberExpression(item))
.DefaultIfEmpty(0)
.Max();
return((int)query + 1);
}