Wants all the references at the end of beamer slides

Question

I want to add all the references at the end of beamer slide. I have a .bib file but it is showing error with "it is part of preamble" for (\bibliography{.bib file}) but when i used it in the preamble it shows no error but no references also

\documentclass{beamer}

\usepackage{beamerthemeDresden}

\usepackage{graphicx,epsfig}
\usepackage{amsmath, amssymb, amsfonts, amsbsy, pstricks, pst-node, pst-text, pst-3d}
\usepackage{tikz}
\usepackage{lmodern}

\usepackage{algorithmic}
\usepackage{float}

\usepackage{biblatex}
\bibliography{scholar}

\begin{document}

\begin{frame}
  \titlepage
\end{frame}


\begin{frame}{Outline}
\tableofcontents
\end{frame}

\begin{frame}[allowframebreaks]
\frametitle{References}
    \tiny{\printbibliography}
\end{frame}

\end{frame}

\begin{frame}
\begin{center}
\Large{Thank You.}\\
%\Large{Its party time now!}
\end{center}
\end{frame}

\end{document} 

Queries: 1. I used the similar code in article (\document) is shows no error of preamble. 2. Why it is so hard to compile with .bib in beamer but it is very easy with article?