[Tex/LaTex] How to change the font size of the number in minted environment

Question

How can I change the font size of the number in minted environment?
The font can be modified with fontsize parameter, but the number on the left side is not affected with it.

This is the code:

\documentclass[11pt,article,oneside]{memoir}

\usepackage{listings}
\usepackage{xcolor}
\usepackage{textcomp}
\usepackage[T1]{fontenc}
\usepackage{minted}

\counterwithout{section}{chapter}

\begin{document}

\begin{minted}[mathescape,
               linenos,
               numbersep=5pt,
               gobble=2,
               frame=lines,
               framesep=2mm,
               fontsize=\tiny]{csharp}
  string title = "This is a Unicode π in the sky"
  /*
  Defined as $\pi=\lim_{n\to\infty}\frac{P_n}{d}$ where $P$ is the perimeter
  of an $n$-sided regular polygon circumscribing a
  circle of diameter $d$.
  */
  const double pi = 3.1415926535
\end{minted}

\end{document}

Answer 1

\theFancyVerbLine should be redefined to control the line number style.

\renewcommand{\theFancyVerbLine}{\sffamily \textcolor[rgb]{0.5,0.5,1.0}{\huge \oldstylenums{\arabic{FancyVerbLine}}}}