Changing the font in one column of a datagrid

Question

I'm trying to change the font for one column in a three column datagrid. - I set the this.dataGridTextBoxColumn1.TextBox.Font = new Font("Ezra SIL", 28) in InitializeComponent() and it seems to display correctly until I fill the dataset behind the datagrid - the font goes back the the default. If I select a cell in column1 after a fill it changes the font to Ezra SIL, but will only do so on a cell by cell basis - as soon as I change the focus to another cell it goes back to the default?? Thanks!