Problem in saving data to an XML file

[phantom2000]

Hi, Im coding a program in C# to save some data in to an XML file. I have 3 questions.

1. Im trying to save my account details in the XML file. The data I want to save is, Account name, Username, Password and Additional info(multiple lines). But I dont know how to arrange the data correctly in to XML elements. I need some help with that.

2. Im using below code to save data to the XML file. But when I try to save another record, it deletes the existing data from the XML file and then add the new record. So now I have only one record. How do I fix it?

3. When saving additional info, I have to save multiple lines of information in a XML element how can I achieve that?

the code Im using right now is below,

private void button1_Click(object sender, EventArgs e)
{
if (Functions.SavetoXML(textBox1.Text, textBox2.Text, textBox3.Text, textBox4.Text) == true)
{
XmlWriterSettings settings = new XmlWriterSettings();
settings.Indent = true;

XmlWriter writer = XmlWriter.Create("Passwords.rar", settings);
writer.WriteStartDocument();
writer.WriteComment("This file is generated by PasswordSave.");
writer.WriteStartElement("Account");
writer.WriteElementString("Name", "" + textBox1.Text);
writer.WriteElementString("Username", "" + textBox2.Text);
writer.WriteElementString("Password", "" + textBox3.Text);
// writer.WriteStartElement("Additinal Info", "" + textBox4.Text);
writer.WriteEndElement();
writer.WriteEndDocument();

writer.Flush();
writer.Close();
MessageBox.Show("Information Saved!", "Done", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}

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