WebNov 14, 2024 · Your GetHashCode implementation always returns the same value.Distinct relies on a good hash function to work efficiently because it internally builds a hash table.. When implementing interfaces of classes it is important to read the documentation, to know which contract you’re supposed to implement. 1. In your code, the solution is to forward … WebIntersection () won't work because that removes duplicates. Contains () won't work because if it sees the int in the second list it returns all matching ints from the first list. Is there a way to do an Intersection that is not Distinct? edit: sorry for not providing an example, here is what I meant: if I have the sets:
c# - Full outer join, on 2 data tables, with a list of columns
WebJul 21, 2016 · I want to get all common rows (including duplicate rows) between two data table having more than 45000 rows. However, I want to skip "Column 2" and "all columns after column 6" out of comparison scope.But I am getting no rows as intersection result. WebInstead, we can use more intuitive implementation, which returns as much of the same elements from the first enumeration as there are, not just a unique one (using … tsc internships
c# - Preserving order with LINQ - Stack Overflow
WebAs was pointed out if you are combining the lists with .Union () you will have to define uniqueness by using the overload passing an IEqualityComparer for your type. var result = q1.Union (q2, myEqualityComparer); otherwise, and easier you could use DistinctBy ( x=> x.TheUniqueId) from the MoreLinq project: WebIf you have objects, not structs (or strings), then you'll have to intersect their keys first, and then select objects by those keys: var ids = list1.Select (x => x.Id).Intersect (list2.Select (x => x.Id)); var result = list1.Where (x => ids.Contains (x.Id)); Share Improve this answer Follow answered Sep 10, 2024 at 15:07 alexkovelsky 3,771 1 27 21 WebMay 29, 2013 · you just need DataTable1, DataTable2 and primarykeys of both tables on which this join will get performed. You can set the datatable primary key as. datatable1.PrimaryKey = new DataColumn [] { captureDT.Columns ["Your Key Name"] }; // Your Code. /// tsc internship july 2022