Question

I am creating a program that encrypts/hashs messages

I have a list that contains (date,user,encryption, message,encryptedmessage)
=> Variables.oHistorique.Liste_historique.

When I just encrypt messages then save it works fine, when I open that file the list contains all the information expected however if I open a file then re-save it (even under a new name) it’s empty, the list is empty.
I appreciate all the help i can get
Thanks

P.S
I’ve checked and the list is populated when I save but not when i open the newly saved file

//when i click open

 private void ouvrirToolStripMenuItem_Click(object sender, EventArgs e)
    {
        FileDialog location = new OpenFileDialog();
        location.Filter = "Data Files (*.dat)|*.dat";
        location.FilterIndex = 1;
        result = location.ShowDialog();

        if (result == DialogResult.OK)
        {
          dataGridView1.Rows.Clear();
          Variables.oHistorique = (CHistorique)oSerialize.DeSerializeObject(location.FileName);
          for (int i = 0; i < Variables.oHistorique.Liste_historique.ToArray().Length; i++)
          {
              dataGridView1.Rows.Add(Variables.oHistorique.Liste_historique[i].Date, Variables.oHistorique.Liste_historique[i].User, Variables.oHistorique.Liste_historique[i].Type, Variables.oHistorique.Liste_historique[i].Chaine, Variables.oHistorique.Liste_historique[i].ChaineCrypt);
          }
          dataGridView1.CurrentCell = null;  
        }
    }

//When I click on save :

private void sauvgarderToolStripMenuItem_Click(object sender, EventArgs e)
    {
        FileDialog location = new SaveFileDialog();
        location.Filter = "Data Files (*.dat)|*.dat";
        location.FilterIndex = 1; 
        result = location.ShowDialog();

        if (result == DialogResult.OK)
        {   
        oSerialize.SerializeObject(CHistorique.GetInstance(),location.FileName);
        }

    }

//Here’s my class Serialize

 class CSerialize
{

    private static CSerialize Instance;

    private CSerialize()
    {

    }

    public void SerializeObject(object o, string file)
    {
        Stream stream = File.Open(file, FileMode.Create);
        BinaryFormatter b = new BinaryFormatter();
        b.Serialize(stream, o);
        stream.Close();
    }
    public object DeSerializeObject(string file)
    {
        Object o;
        Stream stream = File.Open(file, FileMode.Open);
        BinaryFormatter b = new BinaryFormatter();
        o = b.Deserialize(stream);
        stream.Close();
        return o;
    }
    public static CSerialize GetInstance()
    {
        if (Instance == null)
        {
            Instance = new CSerialize();
        }
        return Instance;
    }
}

Answer 1

I found the answer
I replaced

oSerialize.SerializeObject(CHistorique.GetInstance(),location.FileName);

with

oSerialize.SerializeObject(Variables.oHistorique,location.FileName);