private async Task <DocumentCollection> GetOrCreateCollectionAsync(string databaseId, string collectionId)
{
var databaseUri = UriFactory.CreateDatabaseUri(databaseId);
var collection = Client.CreateDocumentCollectionQuery(databaseUri)
.Where(c => c.Id == collectionId)
.AsEnumerable()
.FirstOrDefault() ??
await Client.CreateDocumentCollectionAsync(databaseUri, new DocumentCollection { Id = collectionId });
return(collection);
}
