DocumentDBRepository.cs

        /// <summary>
        /// Checks if the defined document database and collection exists
        /// and initializes them if they don't.
        /// </summary>
        public async Task InitializeDatabaseIfNotExisting(string serverPath)
        {
            var database = _documentClient.CreateDatabaseQuery()
                .Where(db => db.Id == _documentDataBaseId)
                .AsEnumerable()
                .FirstOrDefault();

            if (database == null)
            {
                database = await CreateDocumentDbDatabase();
            }

            var documentCollection = _documentClient.CreateDocumentCollectionQuery(database.SelfLink)
                .Where(c => c.Id == _documentCollectionId)
                .AsEnumerable()
                .FirstOrDefault();

            if (documentCollection == null)
            {
                await CreateDocumentDbCollection(database);
            }

            await InitializeStoredProceduresIfNotExisting(serverPath);
        }