key press event in wpf

Revision 1
Hi..
i want user to enter only numeric number in textbox.

i have got this code.

private void txtType1_KeyPress(object sender, KeyPressEventArgs e)
{
int isNumber = 0;
e.Handled = !int.TryParse(e.KeyChar.ToString(), out isNumber);
}

but i am not getting textbox_KeyPress event.

whats the solution?