title: how to create a dynamic drop down list in C# with window forms
body: <p>I'm trying to build a simple inventory program for a friends cellphone store
  I want to use C# and access database to store the data</p>
  
  <p>the DB will have 2 main lists:</p>
  
  <ol>
  <li><strong>devices</strong> - brand, model, color, price, stock,min_stock</li>
  <li><strong>parts</strong> - brand, model, description,stock,min_stock</li>
  </ol>
  
  <p>the GUI will use several drop lists
  brand will give me : samsung, htc, ect'....
  model will give me : I9000,i9100,ect...</p>
  
  <p>the two main problems I have when I try to think how to make it are this:</p>
  
  <ul>
  <li>Each time new brands and models appear
  so i need an option to add a new model/brand to the database and then update the drop down list to have them automatically </li>
  <li>The drop lists needs to be connected
  so if I choose brand A only brands A models will appear in the model drop list</li>
  </ul>