I’m sorry if this has been covered already, but I haven’t been able to find a solution. I need to remove rows from a DataTable based on a few duplicate columns.  For example, my input could be something like:    and I need to filter this to return:    The problem I’m having is that because of the ID column, none of the rows are completely unique. I need to filter to get unique rows based on “col1” and “col2” but still return all 3 columns for each “unique” row. In other words, I only want to con...