When i set the marathi font to textbox in vb.net using property window it set properly bu when i run and type in textbox then it does not show properly. for example when o press 'k' letter on keyboard the it does not show 'ka' in marathi. so give me solution what extraa additon in project to set marathi font to label and textbox

when I click on 'ADD To CART' button then following error occur.- Rows cannot be programmaticall y added to the DataGridView's rows collection when the control is data-bound.
Coding of 'ADD TO CARCT' button
Private Sub btncart_Click(B yVal sender As System.Object, ByVal e As System.EventArg s) Handles btncart.Click
dgv.Rows.Add()
dgv.Rows(dgv.Ro wCount - 2).Cells(0).Val ue = ComboBox1.Text
...

I have error that is- Rows cannot be programtically added data bound control.
This error occurs when i click on 'Add to Cart' button in my project to add the one record at a time in datagridview.
in this button control i used the logic like datagridview.ro ws.add(), datagridview.ro wcount-2
but this error occur. so give me solution.