private void btnAdditionDblNewPar2_Click(object sender, EventArgs e)
{
unCalculNewPar2 = new calcPar2(Convert.ToDouble(txtA.Text), Convert.ToDouble(txtB.Text));
lblResultat.Text = Convert.ToString(unCalculNewPar2.addition());
}
private void frmCalcul_Load(object sender, EventArgs e)
{
unCalcul = new calc();
unCalculPar2 = new calcPar2();
}