\begin{frame}[fragile]
  \frametitle{LinQ}
  
  \begin{code}{\textwidth}{LinQ: Querying an array}
  \vspace{-1ex}
    \begin{lstlisting}[language=Java,morekeywords={var,from,in,where,select,foreach,Console,orderby}]
//Create an array of integers
int[] myarray = new int[] { 49, 28, 20, 15, 25, 23, 24, 10, 7 };

//Create a a query for odd numbers,
var oddNumbers = from i in myarray where i \% 2 == 1 select i;

//Odd numbers in descending order
var sorted = from i in oddNumbers orderby i descending select i;

//Display the results of the query
foreach (int i in oddNumbers)
  Console.WriteLine(i);
    \end{lstlisting}
  \end{code}
  \vspace{-1ex}
  \pause
  
  LinQ allows query various kinds of data sources:
  \begin{itemize}
    \item LinQ to DataSet (querying data sets like lists)
    \item LinQ to XML
    \item LinQ to SQL (interact with logical database model)
    \item \emph{LinQ to Entities} (interact with conceptual/object model)
  \end{itemize}
\end{frame}