private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {             
            String^ nazva = textBox1->Text;
            int rik = System::Convert::ToInt32(textBox2->Text);
            String^ vudavnuctvo = textBox3->Text;
            double cina = System::Convert::ToDouble(textBox4->Text);
            int kilkist = System::Convert::ToInt32(textBox5->Text);


            StreamWriter^ write = gcnew StreamWriter("Text.txt");

            write->WriteLine(nazva);
            write->WriteLine(rik);
            write->WriteLine(vudavnuctvo);
            write->WriteLine(cina);
            write->WriteLine(kilkist);

            textBox1->Clear();
            textBox2->Clear();
            textBox3->Clear();
            textBox4->Clear();
            textBox5->Clear();

            write->Close();
         }