title: SPList Item get value - ArgumentException
body: <p>I have an <code>SPListItem</code> and I have an array of column names.
  When I try to access the <code>SPListItem</code> values using the code below:</p>
  
  <pre><code>for(int i=0;i&lt;arrColName.length;i++)
  {
      string tempValue =  item[arrColName[i]].ToString();
      // Works fine in case the the specific column in the list item is not null
      // Argument exception - Values does not fall witing expected range
      // exception in case the value //is null
  }
  </code></pre>