public async Task TearDown()
 {
     if (await MongoDBCollectionCollection.ExistsAsync(_collectionName))
     {
         var id = MongoDBCollectionCollection.Id;
         id = MongoDBCollectionResource.CreateResourceIdentifier(id.SubscriptionId, id.ResourceGroupName, id.Parent.Name, id.Name, _collectionName);
         MongoDBCollectionResource collection = this.ArmClient.GetMongoDBCollectionResource(id);
         await collection.DeleteAsync(WaitUntil.Completed);
     }
 }