title: How to get distinct values from a datatable in strongly typed dataset
body: <p>I am using strongly typed dataset and have many tables in that..</p>
  
  <p>The problem is now i want to filter data from </p>
  
  <pre><code>GetData()
  </code></pre>
  
  <p>function which has a query like</p>
  
  <pre><code>select * from table_name
  </code></pre>
  
  <p>How can i filter a particular table and distinct values from it. Also if i try to filter it return all column but rest have null values except the one i asked, so i cannot assign it as a datasource to a <code>datagrid</code> or combobox</p>
  
  <p>How can i do this..</p>