title: is it possible to use ICollector<T> or IAsyncCollector<T> with blobs?
body: <p><strong>Is it possible to use IAsyncCollector / ICollector with a blob binding?</strong></p>
  
  <p>Azure Storage Queues allows you to use <code>ICollector</code> and <code>IAsyncCollector</code> within an output binding like so:</p>
  
  <pre><code>public static class ICollectorExample
  {
      [FunctionName("CopyQueueMessageICollector")]
      public static void Run(
          [QueueTrigger("myqueue-items-source-3")] string myQueueItem,
          [Queue("myqueue-items-destination")] ICollector&lt;string&gt; myDestinationQueue,
          ILogger log)
      {
          log.LogInformation($"C# function processed: {myQueueItem}");
          myDestinationQueue.Add($"Copy 1: {myQueueItem}");
          myDestinationQueue.Add($"Copy 2: {myQueueItem}");
      }
  }
  </code></pre>
  
  <p><strong>Is this functionality available with Blobs?</strong></p>
  
  <p>For example, how can we get this to work?</p>
  
  <pre><code>[Blob("myblob-items-destination")] IAsyncCollector&lt;string&gt; myDestinationBlob,
              ILogger log)
  </code></pre>