title: Join and Group By using Lambda Expression
body: <p>Query</p>
  
  <pre><code> var grpby4 = from u in dtEmp.AsEnumerable()
                           join v in dtDept.AsEnumerable() on u.Field&lt;int&gt;("DepartmentID") equals v.Field&lt;int&gt;("DepartmentID")
                           group u by v.Field&lt;string&gt;("DeptName") into g
                           select new { DeptName = g.Key, Records = g };
  </code></pre>
  
  <p>How write the same Query using Lambda Expression?</p>