what to do to make your row stay on top or at the bottom of your hierarchy.

I use dapfor wpf gridcontrol and when your row stay at the top and the bottom of your hierarchy, it is called docking of row.

C#
//Dock row to the bottom
grid.Rows.Dock = RowDockStyle.Bottom;

//Dock row to the top
grid.Rows[9].Dock = RowDockStyle.Top;

//Undock row
grid.Rows[0].Dock = RowDockStyle.None;