UserCollection? Cant locate dll
<p>Ive added the using Microsoft.SharePoint.Client;</p>

<p>But still getting errors, is it some dll i need to download?</p>

<p>This is the error:</p>

<blockquote>
  <p>The type or namespace name 'SharePoint' does not exist in the
  namespace 'Microsoft' (are you missing an assembly reference?)</p>
</blockquote>
