title: How to access the member of an IGrouping?
body: <p>The two lines below return an <code>IGrouping&lt;string, DataRow&gt;</code>:</p>
  
  <pre><code>var mbVals = GetMBValues_MBvsPU(mbRptDataPkg);
  var puVals = GetPUValues_MBvsPU(puRptDataPkg);
  </code></pre>
  
  <p>I'd though that you could access the grouping's data like this <code>mbVals[StringKey]</code> but that doesn't look possible. I can do a foreach over the DataRows but it just seems to me one should be able to easily access through a linq expression somehow.</p>
  
  <p>What I'd like to do is compare fields in the datarows from one with fields from datarows of the other through the keys.</p>
  
  <p>Any thoughts?</p>
  
  <p>Thanks!</p>