private static bool IsOneLineSelection(IScintillaGateway scintillaGateway, ref int lineNumber) { Position posStart = scintillaGateway.GetSelectionStart(); Position posEnd = scintillaGateway.GetSelectionEnd(); int lineA = scintillaGateway.LineFromPosition(posStart); int lineB = scintillaGateway.LineFromPosition(posEnd); lineNumber = lineA; return(lineA == lineB); }