title: Display multiple datamember in gridview
body: <p>can i display multiple datamember in datagridview
  if i have class like this</p>
  
  <pre><code>class Person{
  string firstname;
  string lastname;
  }
  </code></pre>
  
  <p>and this class</p>
  
  <pre><code>class PersonDifference{
  Person Person1;
  Person Person2;
  }
  </code></pre>
  
  <p>and i want display just firstname from person1 and person2</p>
  
  <p>i use data member like this</p>
  
  <pre><code>datagridview1.DataSource=ListOfPersonDifference;
  datagridview1.DataMember="Person1.firstname,Person2.firstname";
  </code></pre>
  
  <p>but it didn't work can you help me please</p>