title: How I can filter a dataTable with Linq to datatable?
body: <p>hi how i can filter a datatable with linq to datatable? 
  I have a DropDownList and there I can select the value of the Modul Column. Now I want to filter the DataTable with this Modul Column. </p>
  
  <p>here is my datatable structure: </p>
  
  <pre><code>User | Host | TimeDiff | License | Telefon | Modul 
  </code></pre>
  
  <p>Here the Code: </p>
  
  <pre><code>protected void drp_Modules_SelectedIndexChanged(object sender, EventArgs e)
  {
      string value = drp_Modules.SelectedValue;
  
      DataTable tb = (DataTable)Session["dt_Users"];
  
      tb = from item in tb //?????
  
      LoadUsertable(tb);
  }
  </code></pre>