Question

I have a table like the picture below:

I am trying to return a result that will return all rows (and columns) where product codes are the same

I have not really used linq before and have playing around with some group by clauses but havent gotten really anywhere, except returning the each individual part code

var GetProductsRows = from DataRow dr in table.Rows
    group dr by dr.Field<string>("Product Code") into g
    select g;

Somehow I think I am treading water a little out of my depth

Answer 1

A nested linq query should do the trick:

var GetProductsRows = from DataRow dr in table.Rows
    group dr by dr.Field<string>("Product Code") into gp
    from rows in gp where gp.Count() > 1 select rows;

Basically this will select all rows that belong to groups whose count is greater than one.