StreamWriter WriteLine + StringBuilder seems to append an empty line at the end of the file

Hello,

My save to file method appends an additional empty line at the end of the file; which creates issue when I want to re-import the data line by line. (Index out of range)

The "CSV" file already has a trailing empty line; so after it writes it has two. (using pipe '|' delimiters instead of commas ',').

Is this expected behavior?

     public void SaveDialogsBackToFile() {   
         System.Text.StringBuilder sb = new System.Text.StringBuilder();
         sb.AppendLine(string.Join("|", "id", "npc", "order", "dialog", "accept", "decline", "completed"));
         foreach (var dict in dictDialogs) {
             Dialog d = dict.Value;
             sb.AppendLine(string.Join("|", d.id, d.npc, d.order, d.dialog, d.accept, d.decline, d.completed));
         }
         System.IO.StreamWriter stream = System.IO.File.CreateText("Assets/Resources/"+dialogsFile+".csv");
         stream.WriteLine(sb);
         stream.Close();
     }