First of all, you have to add new package to your document:

\usepackage{minted}

Then you can use in the document:

\begin{minted}{csharp}

// your_code

\end{minted}

Adding configuration:

\begin{minted}
[
frame=lines,
framesep=2mm,
baselinestretch=1.2,
fontsize=\footnotesize,
linenos
]
{python}
...

Changing code block identation:

\begin{minted}
[
xleftmargin=...
]
{python}
...

Changing line numbers size (you have to add it before \begin{document}):

\renewcommand\theFancyVerbLine{\large\arabic{FancyVerbLine}}

For adding label and caption to the code listing, you have to add something like below:

\begin{listing}[H]
\begin{minted}
[
    // config
]
{csharp}
// code
\end{minted}
\caption{Caption}
\label{lst:label}
\end{listing}

Useful resources:

• Code Highlighting with minted
• Stack Exchange: Alignment of minted line numbers
• Stack Overflow: How to change the font size of line numbers using the Minted Latex Package
• The minted package: Highlighted source code in LaTeX

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