BoxInformation.ViewRecord.myBoxesTextBox_TextChanged C# (CSharp) Метод

        public void myBoxesTextBox_TextChanged(object sender, EventArgs e)
        {
            Button btnSender = (Button)sender;
            string txtID = btnSender.ID.Replace("btn", "txt");
            TextBox senderBox = (TextBox)FindControl(txtID);
            string officeID = senderBox.ID;
            officeID = officeID.Replace("txt", "");
            officeID = officeID.Replace("Boxes", "");
            int counter = 0;
            int indexToChange = -1;
            string Office = "";

            foreach (KeyValuePair<string, int> currentKVP in boxData)
            {
                if (currentKVP.Key.ToString() == officeID)
                {
                    indexToChange = counter;
                    Office = currentKVP.Key.ToString();
                }
                counter++;
            }

            if (indexToChange != -1)
            {
                if (int.Parse(senderBox.Text) == 0)
                {
                    boxData.RemoveAt(indexToChange);
                }
                else
                {
                    boxData[indexToChange] = new KeyValuePair<string, int>(Office, int.Parse(senderBox.Text));
                }
            }

            Presenter.UpdateRecord();
            txtBoxLocation.Text = "";
            txtNumberOfBoxes.Text = "";
            Presenter.GetRecordById(Request.QueryString["ID"]);
            DrawBoxDetails();
        }