private void button1_Click(object sender, EventArgs e)
        {
            if(textBox1.Text.Length>0 && textBox3.Text.Length>0 && listBox1.Items.Count>0)
            {
                if (newReceptProducts.Count != 0)
                {
                    if (comboBox1.SelectedIndex > -1)
                    {
                        Recept recept = new Recept();
                        recept.IdRecept = Guid.NewGuid().ToString();
                        recept.NameRecept = textBox1.Text;
                        recept.TextRecept = textBox3.Text.Replace("\r\n", "newline");
                        recept.TypeRecept = mainForm.RtDict.getKeyByValue(comboBox1.SelectedItem.ToString().Trim());
                        mainForm.ReceptList.Add(recept);

                        foreach (var listItem in listBox1.Items)
                        {
                            PR pr = new PR();
                            pr.IdP = listItem.ToString().Split('|')[0];
                            pr.IdR = recept.IdRecept;
                            pr.Kolvo = listItem.ToString().Split('|')[2];
                            pr.Ei = listItem.ToString().Split('|')[3];
                            pr.Obyaz = listItem.ToString().Split('|')[4];
                            mainForm.PrList.Add(pr);
                        }

                        using (System.IO.StreamWriter file = new System.IO.StreamWriter(@"Recept"))
                        {
                            foreach (var rcpt in mainForm.ReceptList)
                            {
                                file.WriteLine(rcpt.IdRecept + "|" + rcpt.NameRecept + "|" + rcpt.TextRecept + "|" + rcpt.TypeRecept);
                            }
                            file.Close();
                        }

                        using (System.IO.StreamWriter file = new System.IO.StreamWriter(@"PR"))
                        {
                            foreach (var pr in mainForm.PrList)
                            {
                                file.WriteLine(pr.IdP + "|" + pr.IdR + "|" + pr.Kolvo + "|" + pr.Ei + "|" + pr.Obyaz);
                            }
                            file.Close();
                        }
                        mainForm.Init();
                        Close();
                    }
                }

            }
        }
 private void readPR()
 {
     PrList = new List<PR>();
     String line;
     var file = new System.IO.StreamReader("PR", Encoding.UTF8);
     while ((line = file.ReadLine()) != null)
     {
         PR rNew = new PR();
         String[] parsRec = line.Split('|');
         rNew.IdP = parsRec[0];
         rNew.IdR = parsRec[1];
         rNew.Kolvo = parsRec[2];
         rNew.Ei = parsRec[3];
         rNew.Obyaz = parsRec[4];
         PrList.Add(rNew);
     }
     file.Close();
 }