title: Finding a column in a DataTable row
body: <pre><code> Client_Payroll_Items.AsEnumerable().Select((row, index) =&gt; new {row, index})
      .Where(
              (x =&gt; x.row.Client_KEY == 3)   &amp;&amp;
              (x =&gt; x.row.Description == "401(k) % of Gross")
      )
      //.Where(x =&gt; x.row.Description == "401(k) % of Gross")
     .Select(x=&gt; x.row.Payroll_item_calculation_type_KEY)
     .DefaultIfEmpty(-1)
     .First();
  </code></pre>
  
  <p>When I am running it I am getting "Operator '&amp;&amp;' cannot be applied to operands of type 'lambda expression' and 'lambda expression'" error. </p>
  
  <pre><code> Client_Payroll_Items
      .AsEnumerable()
      .Select((row, index) =&gt; new {row, index})
      .Where(x =&gt; x.row.Client_KEY == 3)
      .Where(x =&gt; x.row.Description == "401(k) % of Gross")
      .Select(x=&gt; x.row.Payroll_item_calculation_type_KEY)
      .DefaultIfEmpty(-1)
      .First()
  </code></pre>
  
  <p>The latest one runs and I get what I need.</p>
  
  <p>Question - why the error in the first code?  </p>