How can I display the difference of the date and time of a post and the current time ?

For example, If i posted an article on August 17, 2021 06:30AM, in the label it will display "Posted 2 years ago".

Or it will display like "2 years, 3 days ago". Or maybe add the time as well like "2 years, 3 days 1 hour 23 minutes 3 seconds ago"

I tried this but it displayed 239 days ago (and that depends on the Date I posted the article).

But what if the Date exceeds 1 year, or 4 years, will it display as "1 year ago" or "4 years ago" depending on the date?

private void PopulateArticle()
{
    try
    {
         string articleId = this.Page.RouteData.Values["ArticleId"].ToString();
         string articleTitle = this.Request.QueryString["Title"].ToString();
         if (articleId != null)
         {
            string query = "SELECT [Title], [Body], [DatePosted] FROM [Articles] WHERE [ArticleId] = @ArticleId";
            string connectionString = ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;
            using (SqlConnection con = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(query))
                {
                    using (SqlDataAdapter sda = new SqlDataAdapter())
                    {
                        cmd.Parameters.AddWithValue("@ArticleId", articleId);
                        cmd.Connection = con;
                        sda.SelectCommand = cmd;
                        using (DataTable dt = new DataTable())
                        {
                            sda.Fill(dt);
                            lblBody.Text = dt.Rows[0]["Body"].ToString();
                            TitleLabel.Text = dt.Rows[0]["Title"].ToString();
 
                            DateTime PostedTime = Convert.ToDateTime(dt.Rows[0]["DatePosted"]);
                            Thread.Sleep(3 * 1000);
                            DateTime CurrentTime = DateTime.Now;
 
                            TimeSpan diff = CurrentTime - PostedTime;
                            timelbl.Text = $"Posted {(int)diff.TotalDays} days ago ";
                         }
                    }
                }
            }
         }
    }
    catch (SqlException ex)
    {
        string msg = "Error:";
        msg += ex.Message;
        throw new Exception(msg);
    }
}