how to insert Different line in DataGridView

hi

i have this database for example:

id | name | age
==========
1 | A        | 30
2 | B        | 34
3 | C        | 40
4 | D        | 50

and when i show this table in my DataGridView i see it like the table.

how to insert Different line in DataGridView ? for example like this:

id | name | age
==========
1 | A        | 30
this Different line
2 | B        | 34
3 | C        | 40
4444 - example
4 | D        | 50

work on C# WinForms

thanks