title: Add a new value to a Dictionary with in a workflow
body: <p>I need to add a new value to my <code>dictionary&lt;Int32, String&gt;</code> with in a workflow. The Assign activity complains that the Add method of the dictionary &lt;> doesn't return any value.</p>
  
  <p>How do I go about this?</p>
  
  <p>Visual Studio 2012
  Workflow Designer</p>
  
  <p>Update:</p>
  
  <p>No code. It on the designer. I tried Assign activity but it check if the Value portion returns something. So this became rather a general question. I have a complex workflow and in it, I need to track the audio samples collected by the system and are marked as Invalid. I need to process this collection later. Now, I can use an array as well but the issue will remain the same: How can i call the <em>Collection</em>.Add() method, which returns nothing, on the workflow designer.</p>