Question

Given the following data, how does one select only the latest version for each item using LINQ?

ItemId, Version
===================
A, 1
A, 2
A, 3
B, 8
B, 9,
C, 10
C, 11

The desired results are:

A, 3
B, 9
C, 11

In TSQL, I would do something like so:

SELECT * FROM MyTable AS Tbl1

WHERE Tbl1.Version = 

(SELECT MAX(Version) 
FROM MyTable 
WHERE MyTable.ItemId = Tbl1.ItemId)

Answer 1

I would go with something like:

MyTable
.GroupBy(row => row.ItemId)
.Select(grouping => 
    new
    {   
        ItemId = grouping.Key, 
        Version = grouping.Max(row => row.Version),
    });

EDIT: Fixed bad SQL output.