title: mono c#. DataRow: "Field" extension method missing?
body: <p>I've often used the DataRow object (or DataRowCollection) when programming C# in Windows (.NET Framework 3 and 3.5). 
  Now, I want to use it in a C# program developed with mono in Linux. 
  My problem is: I don't find the "Field" extension method of DataRow when using mono... anyone can help me, please ? </p>
  
  <p>Thanks in advance. </p>
  
  <p>(example: <code>return ds.Table[0].Rows[0].Field&lt;int&gt;(0)</code> )</p>