Get data from Database and bind DataGridView using C# in Windows Forms Application

Hi! I used this method, but I couldn't show data in dataGridView. Who is you can help me for solve by this method.

private void JobForm_Load(object sender, EventArgs e)
{
    Grid.DataSource = GetData();
}

public List<object> GetData()
{
    SqlCommand cmd = con.CreateCommand();
    cmd.CommandText = "select iddol, named, salaryb, salarys from tabdolj";
    List<object> rc = new List<object>();
    con.Open();
    SqlDataReader r = cmd.ExecuteReader();
    try
    {
        if (r != null)
        {
            while (r.Read())
            {
                rc.Add(new
                {
                    iddol = r.GetInt32(0),
                    named = r.GetString(1),
                    salaryb = r.GetDouble(2),
                    salarys = r.GetDouble(3)
                });
            }
        }
    }
    catch { }
    con.Close();
    return rc;
}