public bool Clear()
{
var principalName = BuildKey(string.Empty);
foreach (var key in _clients.Keys.Where(q => q.StartsWith(principalName)))
{
IHttpClient client=null;
var retries = 5;
while (retries > 0)
{
var success = _clients.TryRemove(key, out client);
if (success) break;
Thread.Sleep(42);
retries--;
}
if (client == null)
{
return false;
}
client.Abort();
client = null;
}
return true;
}