private void button2_Click(object sender, EventArgs e) { if (Int32.TryParse(numFirstValue.Text, out int One) && Int32.TryParse(numSecondValue.Text, out int Two) && Int32.TryParse(numThirdValue.Text, out int Three) && Int32.TryParse(number.Text, out int Chislo)) { int firstNumber = Convert.ToInt32(numFirstValue.Text); int secondNumber = Convert.ToInt32(numSecondValue.Text); int thirdNumber = Convert.ToInt32(numThirdValue.Text); int chislo = Convert.ToInt32(number.Text); Lib_5.Triad triadNumbers = new Triad(firstNumber, secondNumber, thirdNumber, chislo); //Произведение triadNumbers.GetMultiplay2(); //Вывод rez2.Text = triadNumbers.FirstNumber.ToString() + triadNumbers.SecondNumber.ToString() + triadNumbers.ThirdNumber.ToString(); } else { MessageBox.Show("Введите правильное значение"); } }