find rows with same value using LINQ - linq

Question

The issue with the image above is that
I want to apply a bonus share to the shareholders based on the TransLog_Date
Because the shareholder in row 1 has already transferred a portion of his shares to the holder in row 3, his new share value is what shows in row 2 column 5 as 100000
I want the bonus share to be calculated based on the value in row 2, column 5 but not on row 1, column 5.
I have tried several codes in LINQ but getting it wrong as the value is multiplied on all the 3 records which is totally wrong.
var transQuery = (from tq in db.TransactionsLogDbSet
where (tq.TransactionType == TransactionType.PurchaseOfShares)
|| (tq.TransactionType == TransactionType.TransferOfShares)
|| (tq.TransactionType == TransactionType.BonusSharesDeclared)
select tq);
var query = from row in db.TransactionsLogDbSet
group row by row.Transholder_ID into g
select new { Count = g.Count() };

Answer 1

OK, i think I finally got what you want.
Is that right?: Group all rows of some TransactionTypes by the Transholder_ID, then from each group select the row with the maximum Translog_Date, giving you the most recent row per Transholder_ID. Once you have the result of that, you can iterate over it to calculate whatever you need.
from t in db.TransactionLogDbSet
where where tq.TransactionType == TransactionType.PurchaseOfShares || tq.TransactionType == TransactionType.TransferOfShares || tq.TransactionType == TransactionType.BonusSharesDeclared
group t by t.Transholder_ID into g
select (from t1 in g orderby t1.Translog_Date descending select t1).First();
EDIT: I'll continue to edit the following part of my answer as long as we finally arrive at the correct query.
From you last comment so far it follows that you just want to select all rows with a TransLog_Date <= a given DateTime qualifiedDate.
from t in db.TransactionLogDbSet
where t.TransactionLog_Date <= qualifiedDate
select t
Is that it?