Question

On the select and sorting query below … how would I be able to do the orderby of tmp on the TagId order of global?

Two lists … both have different number of items, but both have a field called TagId. I want to return the list of expensesSummary_MemberTmp but sorted by the order of TagId from expensesSummary_MemberTmp.

var expensesSummary_Member = from global in expensesSummary_Global.Select(x => x.TagId).ToList()
                             join tmp in expensesSummary_MemberTmp
                             on global equals tmp.TagId
                             orderby tmp.TagId
                             select tmp;

Answer 1

If you want to preserve the order of the first sequence, you shouldn’t order the result at all:

var expensesSummary_Member =
    from global in expensesSummary_Global.Select(x => x.TagId).ToList()
    join tmp in expensesSummary_MemberTmp
    on global equals tmp.TagId
    select tmp;