Question

Dataset1

col1 col2
—- —-

1    a
2    b
3    c

Dataset2

col1
—-
doctor
engineer
programmer

I want this in grid view like this

col1 col2 col3
—- —- —-
1     a    doctor
2    b    engineer
3    c    Programmer

Answer 1

In your case , you have no need to merge 2 DataTables

You can use linq instead.

        var datasource = from r1 in table1.AsEnumerable().Select((r, i) => new { Value = r, Index = i })
                         from r2 in table2.AsEnumerable().Select((r, i) => new { Value = r, Index = i })
                         where r1.Index == r2.Index 
                         select new
                         {
                             col1 = r1.Value["col1"].ToString(),
                             col2 = r1.Value["col2"].ToString(),
                             col3 = r2.Value["col1"].ToString(),
                         };

Then , Bound it like.

datagridview.datasource = datasource ;