If I have two data tables and want to write them in the output pane

Help
1

If I have two data tables
Data Table 1
1
2
3
Data Table 2
a
b
c
Using For each row How can I write the output like as following
1
a
2
b
3
c

2

While(index < dt1.Rows.Count){
WriteLine as dt1.Rows(index)(0).ToString;
WriteLine as dt2.Rows(index)(0).ToString;
}