Retrieves the last remembered appended string for this instance.
Declaration
public static string LastAppended(this StringBuilder sb)
Example
var sb = new StringBuilder("Code is like humor.");
var lastAppended = sb.LastAppended(); // null
sb.Append("When you have to explain it,", false);
lastAppended = sb.LastAppended(); // null
sb.AppendLine("it’s bad.", true);
lastAppended = sb.LastAppended(); // "it’s bad."
