MoreLINQ | Extensions to LINQ to Objects | Database library

Context: I have an application that allows the user to process all the mailed-in payments received that day. Sometimes an envelope may include multiple checks for the same account (think two roommates each paying their portion of a utility bill).

Restrictions: Process all the payments in batches of 10 but the Account ID must be unique per batch.

Very simplified Payment class:

Theres a Do method in System.Reactive to a execute a mutator for each item in the sequence.

Is there any equivalent method for IEnumerable either in standard library or third parties like morelinq?

I am trying to get a list of distinct items from a database. I want the result to be in a list of CarMakes, which has only one property called Make.

I can get the following items to work in LINQPad, but when I try to get it working in C#. I get the following error

" .First()' could not be translated. Either rewrite the query in a form that can be translated, or switch to client evaluation explicitly by inserting a call to either AsEnumerable(),"

I'm seeing some odd behavioral differences when calling Task.WhenAll(IEnumerable>) and calling Task.WhenAll(List>) while trying to catch exceptions

My code is as follows:

I have come across this code in MoreLinq, in file Batch.cs (link):

I'm trying to process some data based on their time stamps. I have a working solution, but I feel that it could be expressed in a much cleaner way using LINQ.

I need to do the following:

1. Sort the list, based on the timestamp
2. Round off the milliseconds
3. Remove any duplicate values (does not matter which is removed)

Here is my current working solution:

Summary: Remove duplicates from custom List of Lists

I tried using various existing methods to remove the duplicates from other stack overflow posts, some examples would be:

var distinctWords = combinedList.Distinct().ToList();

fooArray.GroupBy(x => x.Id).Select(x => x.First());

These solutions only filter based on 1 criteria, I need to remove the duplicates based on 2 criteria, if the year and id match then the duplicate needs to be removed. There can be different years that have the same id. I would like to do this without using MoreLINQ.

Model:

net core 2.1 elasticsearch working in development, it doesn't work in release, this is my elasticsearch class

Need to find the orders in a list that are

• unique by title
• have the longest Description

Wanted result a List of two items