Question

Is there any way to subtract two datatables in order to have rows of the first datatable that are not in the second one?

I have tried .Except() method like below but it does not work for me.

dt1.AsEnumerable().Except(dt2.AsEnumerable()).CopyToDataTable();

I think i have mistake in using this method but i could not find that?

Answer 1

I have used the following code to subtract two datatables from each other :

var query =    
    from row1 in dt1    
    where !(from row2 in dt2    
            select row2.ID)    
           .Contains(row1.ID)    
    select row1;

this code returns exactly what i want…