title: Combine two generic lists of different types
body: <p>I have two lists as </p>
  
  <pre><code>List &lt;BillDetails&gt;= new List&lt;BillDetails&gt;();  
  List&lt;Header&gt;=new List&lt;Header&gt;();
  
  Public class Billdetails  
  {    
      public string chargecategory;  
      public string materialcode;  
      public int price;  
      public int quantity;  
  }
  
  public class Header  
  {  
      public string chargecode;  
      public string customername;  
  }  
  </code></pre>
  
  <p>These two lists are not linked in any way. But I have to combine them these two into one list and bind it to a gridview.</p>
  
  <p>Please help me in combining or merging these two lists without anything in common between them.</p>
  
  <p>Thanks in advance.</p>