BindingSource1 - C#

 public partial class Form3 : Form
    {
        public Form3()
        {
            InitializeComponent();
 
            BindingSource1.DataSource = new List<Пациент>();
        }
        private XmlSerializer xmls = new XmlSerializer(typeof(List<Пациент>));
 
        private void SaveData(string name)
        {
            if (name = "" || dataGridView1.RowCount == 1)
                return;
            StreamWriter sw = new StreamWriter(name, false, Encoding.Default);
            xmls.Serialize(sw, BindingSource1.DataSource);
            sw.Close();
 
        }