private void timer1_Tick(object sender, EventArgs e)
        {
            try
            {

                numbers = Convert.ToInt64(textBox1.Text);
                
                if (numbers <= 0)
                {
                    timer1.Stop();
                    button1.Enabled = true;
                    textBox1.Enabled = true;
                    MessageBox.Show("Value cannot be zero or below zero");
                    textBox1.Text = "";
                }
                else
                {
                    Numbers_Timer = Numbers_Timer + 1;
                    if (Numbers_Timer == numbers)
                    {
                        filesdownload();
                        button1.Enabled = false;
                        Numbers_Timer = 0;
                    }
                    //    String str = string.Format("Hours {0} Minutes {1} Seconds {2}", c, d, e);

                    time_left = numbers - Numbers_Timer;
                    label1.Text = "Time left for next download: " + time_left;
                    //   y = numbers - 1;
                    //  label1.Text = "Time left for next download: " +y;
                    /*  if (a == 1)
                      {
                          a=numbers; 
                          button1.Enabled = false;
                      } */
                    //String str = string.Format("Hours {0} Minutes {1} Seconds {2}", c, d, e);
                    //    this.label1.Text = str;
                    /*    String str = string.Format("{0} {1}", c, d);
                        this.textBox1.Text = str;
                        c = c - 1;
                        d = d - 1; */
                }
            }
            catch (Exception General_Exceptions)
            {
                
                timer1.Stop();
                int size = textBox1.Text.Length;
                if (size != 0)
                {
                    
                    MessageBox.Show("Sorry you cannot enter letters into the textbox.");
                    
                }
                else
                {
                    Logger.Write("Exception: " + General_Exceptions);
                    MessageBox.Show("test:" + General_Exceptions);
                }
                
                textBox1.Clear();
                button1.Enabled = true;
                textBox1.Enabled = true;
            }
        }