WrapMode in Datagrid

Hi

In winforms i have this in a datagridview:
dgvRegistros.DefaultCellStyle.WrapMode = DataGridViewTriState.True;

I want the same behavior in Silverlight in a datagrid, how can i get it done?

Insted of:
MyField
--------
This is my name blah blah blah

I want:
MyField
--------
This is my name
blah blah blah

thanks in advance