How should I turn off the resize of a window form?

Ok, I found a solution, I don't really know if this is the best way, but what I did was change the FormBorderStyle into Fixed Single (on design environment) or I could do it programmaticaly just defining on the Load method this

private void App_test_Load(object sender, EventArgs e)

FormBorderStyle = FormBorderStyle.FixedSingle;