gistfile1.txt

        public class LineEditor {

                public delegate string [] AutoCompleteHandler (string text, int pos);

                /// <summary>
                ///   Invoked when the user requests auto-completion using the tab character
                /// </summary>
                /// <remarks>
                ///    The result is null for no values found, an array with a single
                ///    string, in that case the string should be the text to be inserted
                ///    for example if the word at pos is "T", the result for a completion
                ///    of "ToString" should be "oString", not "ToString".
                ///
                ///    When there are multiple results, the result should be the full
                ///    text
                /// </remarks>
                public AutoCompleteHandler AutoCompleteEvent;