C#

List<string> savedControls = new List<string>();
List<Control> formControls = new List<Control>();
 //load
       private void button2_Click(object sender, EventArgs e)
       {
           savedControls.Clear(); formControls.Clear();
           StreamReader sr = new StreamReader(path + "\\settings.txt");
           string s = sr.ReadToEnd();


           RichTextBox text = new RichTextBox();
           text.Text = s;
           foreach (Control c in this.Controls)
           {
               formControls.Add(c);
           }
           for (int i = 0; i <= text.Lines.Length - 1; i++)
           {
               savedControls.Add(text.Lines[i]);
           }
           for (int i = 0; i <= formControls.Count - 1; i++)
           {
               for (int j = 0; j <= savedControls.Count - 1; j++)
               {
                   if (savedControls[j].Contains(formControls[i].Name))
                   {
                       savedControls[j] = savedControls[j].Replace(formControls[i].Name + "=", "");



                       //how do I iterate through multiple controls(numericUpDown's) in Form1?
                       //numericUpDown1.Value = int.Parse(savedControls[j]);
                       //thanks


                   }
               }
           }
           sr.Close();
       }