[Tex/LaTex] Spacing problem while using itemize in minipage

Question

I am using itemize in minipage and observe unexpected spacing among items.

\documentclass[11pt,table,a4paper]{article}
\usepackage[framemethod=TikZ]{mdframed}
\usepackage[top=.5cm, bottom=2cm, left=1cm, right=1cm]{geometry}
\usepackage{wrapfig}
\usepackage{enumitem}
\begin{document}

This is first line.\newline
 \begin{minipage}{\textwidth}\begin{itemize}[topsep=0ex]
 \item First Item
 \item Second Item
 \item Third Item
 \end{itemize}\end{minipage}  
 \newline This is second line.
 \end{document}

How can I fix this problem?

Answer 1

I am not sure about this, but maybe the following is what you are looking for.

Code

\documentclass{article}
\usepackage{enumitem}

\begin{document}

\noindent This is first line.\\[\baselineskip]
\begin{minipage}{\textwidth}
\begin{itemize}
\item First Item
\item Second Item
\item Third Item
\end{itemize}
\end{minipage}
\\[\baselineskip] This is second line.

\end{document}

Output

Update

Code

\documentclass{article}
\usepackage{enumitem}

\setlength\parindent{0pt}

\begin{document}

This is first line.\\[0.5\baselineskip]
\begin{minipage}{\textwidth}
\begin{itemize}
\item First Item
\item Second Item
\item Third Item
\end{itemize}
\end{minipage}
\\[0.5\baselineskip] This is second line.

\end{document}

Output