FastColoredTextBoxNS.FileTextSource.LineHasFoldingEndMarker C# (CSharp) Метод

        public override bool LineHasFoldingEndMarker(int iLine)
        {
            if (lines[iLine] == null)
                return false;
            else
                return !string.IsNullOrEmpty(lines[iLine].FoldingEndMarker);
        }