public async Task <IEnumerable <T> > GetAll(Expression <Func <T, bool> > filter = null,
Func <IQueryable <T>, IOrderedQueryable <T> > orderBy = null,
string includeProperties = "")
{
var query = DBSet.AsQueryable();
if (filter != null)
{
query = query.Where(filter);
}
foreach (var includeProperty in includeProperties.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries))
{
query = query.Include(includeProperty);
}
return(orderBy != null ? await orderBy(query).ToListAsync() : await query.ToListAsync());
}