title: Why isn't DeleteKey working, for Azure RedisCache?
body: <p>I'm using Azure RedisCache, and when I call the following command:</p>
  <pre><code>_cache.KeyDelete(key, CommandFlags.HighPriority)
  </code></pre>
  <p>The key is not deleted and there are no errors.</p>
  <p>Similarly, nor does the following work if a key/value is already set:</p>
  <pre><code>_cache.StringSet(dataKey, &quot;&quot;)
  _cache.KeyExpire(dataKey, DateTime.UtcNow.AddDays(-2), CommandFlags.HighPriority)
  </code></pre>