private void btnVenta_Click(object sender, EventArgs e)
{
this.Dispose();
AdminMantenedorVenta frm2 = new AdminMantenedorVenta();
frm2.Show();
}
private void AdminMantenedorVenta_FormClosing(object sender, FormClosingEventArgs e)
{
AdminMantenedorVenta frm = new AdminMantenedorVenta();
AdminCrud frm2 = new AdminCrud();
frm.Dispose();
frm2.Show();
}