FastColoredTextBoxNS.InsertCharCommand.Execute C# (CSharp) Method

        public override void Execute()
        {
            ts.CurrentTB.ExpandBlock(ts.CurrentTB.Selection.Start.iLine);
            string s = c.ToString();
            ts.OnTextChanging(ref s);
            if (s.Length == 1)
                c = s[0];

            if (String.IsNullOrEmpty(s))
                throw new ArgumentOutOfRangeException();

            if (ts.Count == 0)
                InsertLine(ts);
            InsertChar(c, ref deletedChar, ts);

            ts.NeedRecalc(new TextSource.TextChangedEventArgs(ts.CurrentTB.Selection.Start.iLine, ts.CurrentTB.Selection.Start.iLine));
            base.Execute();
        }