Help me with this code

if (!IsPostBack)
    {
        List countries = GetCountries();

        // Add "Select" as the first item in the list
        countries.Insert(0, new Country { Id = 0, Name = "Select" });

        ddlCountries.DataSource = countries;
        ddlCountries.DataBind();
    }
}

private List GetCountries()
{
    // Code to retrieve the list of countries from the database
    // and return it as a List
    // Replace this with your actual data retrieval logic
    List countries = new List