i am having a issues with my check boxes they wont write or load

i have 3 check boxes Nuts Cherries Sprinkles

also i am using Streamwriter and StreamReader

i also have 2 combo boxes and im using an index for those to work with writer/reader

but my checkboxes wont work i am using if ele if statments for the check boxes and im out of ideas syntax is correct as far as i know (if theres another way to get my check boxes to read and write let me know) THERE HAS TO BE A DIFFRENT WAY syntax wise to make this work lets PLEASE LET ME KNOW

for some reason i get no errors in the Debugger

THIS IS my LOAD BUTTON //(THIS IS WHERE IM HAVING PROBLEMS)

 private void openToolStripMenuItem_Click(object sender, EventArgs e)
    {
        StreamReader sr;
        string strInput;

        OpenFileDialog ofd = new OpenFileDialog();

        if (ofd.ShowDialog() == DialogResult.OK)
        {
            sr = new StreamReader(ofd.FileName);

            strInput = sr.ReadLine();
            savedIndex = Convert.ToInt32(strInput);
            flavorBox.SelectedIndex = savedIndex;
            syrupBox.SelectedIndex = savedIndex;


            if (Nuts.Checked == true) 
                {

               sr.ReadLine();

                }
            else if(Cherries.Checked == true)
            {
                sr.ReadLine();
            }

            if(Sprinkles.Checked == true)
            {
                sr.ReadLine();
            }
            sr.Close();

        }

    }

THIS IS MY SAVE BUTTON (AND HERE TO I MUST BE MISSING SOMETHING)

 public partial class Form1 : Form
{
    int savedIndex = 0;

    public Form1()
    {
        //index for flavor of icecream
        InitializeComponent();
        flavorBox.SelectedIndex = 0;
        syrupBox.SelectedIndex = 0;
        pictureBox1.Image = Properties.Resources.Vanilla;
        //Nuts.
    }
    // my save fucntion
    private void saveToolStripMenuItem_Click(object sender, EventArgs e)
    {
        StreamWriter sw;

        SaveFileDialog sfd = new SaveFileDialog();

        if (sfd.ShowDialog() == DialogResult.OK)
        {
            sw = new StreamWriter(sfd.FileName);
            savedIndex = flavorBox.SelectedIndex;

            sw.WriteLine(flavorBox.SelectedIndex);

            if (Nuts.Checked == true)
            {
                sw.WriteLine();

            }
          else if (Cherries.Checked == true)
            {
                sw.WriteLine();
            }

            else if(Sprinkles.Checked == true)
            {
                sw.WriteLine();
            }

            sw.Close();
        }

    }

THIS IS MY REVERT BUTTON WHERE THE USER CAN OPEN A SAVED FILE THEN MAKE CHANGES AND JUST CLICK REVERT AND IT WILL GO BACK TO ITS ORIGINAL SAVED FILE WITH OUT RE OPENING THE FILE

private void revertToolStripMenuItem_Click(object sender, EventArgs e)
    {
        flavorBox.SelectedIndex = savedIndex;
        syrupBox.SelectedIndex = savedIndex;

    }

THIS IS MY INDEX FOR THE COMBO BOX

 private void flavorBox_SelectedIndexChanged(object sender, EventArgs e)
    {
        int index = flavorBox.SelectedIndex;

        if (index == 0)
        {
            pictureBox1.Image = Properties.Resources.Vanilla;
        }
        else if (index == 1)
        {
            pictureBox1.Image = Properties.Resources.Chocolate;
        }
        else if (index == 2)
        {
            pictureBox1.Image = Properties.Resources.strawberry;
        }

    }

HERES MY EXPEREMENTAL IDEA TRYING TO GET THE CHECK BOX TO WORK

 private void Nuts_CheckedChanged(object sender, EventArgs e)
    {
        if(Nuts.Checked == true)
        {
            Nuts.Checked = true;
        }

        else if(Nuts.Checked != true)
                {
            //Nuts.unchecked()
        }