async public Task UpdateMetadataProviders()
{
_providers = _providers ?? new ConcurrentBag <IMetadataProvider>();
var metadataProviders = new PlugInManager().GetPluginInstances(typeof(IMetadataProvider)).ToArray();
foreach (var metadataProvider in metadataProviders.Where(p => p is IMetadataProvider))
{
if (await((IMetadataProvider)metadataProvider).ApplyTo(this))
{
if (_providers.Where(p => p.GetType().Equals(metadataProvider.GetType())).Count() == 0)
{
_providers.Add((IMetadataProvider)metadataProvider);
}
}
}
}