public async Task<Catalog> AddProduct(
          Catalog order)
        {
            var requestOptions =
                new RequestOptions
                {
                    PartitionKey = new PartitionKey(order.Id.ToString())
                };

            var catalogDocument = await _cosmosClient.CreateDocumentAsync(
                UriFactory.CreateDocumentCollectionUri(
                    _azureCosmosDbOptions.Value.DatabaseId, "catalog"), order, requestOptions);

            return
                (Catalog)((dynamic)catalogDocument.Resource);
        }

"id": "8000003c-0001-fb00-b63f-84710c7967aa",

    "industy": {

      "category": [
        {

          "subcategory": [
            {
                product1,product2.....
                }