private void Button1_Click(object sender, EventArgs e)
        {
            update1();
        }
        private void update1()
        {
            string text = text = UpdatedArray();

            File.WriteAllText("account1.txt", text);
        }

       public string UpdatedArray()
        {
            filelist = new string[LineNo];
            row = GetRowNumber();

            int newbal; string strbal;
            newbal = Convert.ToInt32(label3.Text) + Convert.ToInt32(textBox1.Text);
            strbal = Convert.ToString(newbal);
            string username = login.accountname;
            TextReader sr = new StreamReader("account.txt");
            string line = "";
            bool found = false;
            string text = File.ReadAllText("account.txt");
            while ((line = sr.ReadLine()) != null)
            {
                string[] components = line.Split(" ".ToCharArray());
                if (components.Contains(username))
                {
                    found = true;
                }
                if(found == true)
                {
                    string str, str1, str2;
                    str = components[5];
                    str1 = line.Replace(str, strbal);
                    str2 = string.Join(" ", str1);
                    text = text.Replace(filelist[row], str2);
                }
            }
            sr.Close();
            return text;
        }

        public int GetRowNumber()
        {
            string username = login.accountname;
            TextReader sr = new StreamReader("account.txt");
            bool found = false;
            int i = 0;
            while (i < LineNo && !found)
            {
                filelist[i] = sr.ReadLine();
                if (filelist[i].Contains(username))
                    found = true;
                else i++;
            }
            if (found == true)
            {
                row = i;

                sr.Close();
            }

            return row;

        }