// Add batch request steps to BatchRequestContent.
BatchRequestContent batchRequestContent = new BatchRequestContent(batchRequestStep1, batchRequestStep2);

/* Use the Request builders :) */
BatchResponseContent returnedResponse = await graphServiceClient.Batch.Request().PostAsync(batchRequestContent);

/* Read the responses :) */
HttpResponseMessage firstResponse = await returnedResponse.GetResponseByIdAsync("1");
            HttpResponseMessage secondResponse = await returnedResponse.GetResponseByIdAsync("2");

// Send batch request with BatchRequestContent.
HttpResponseMessage response = await httpClient.PostAsync("https://graph.microsoft.com/v1.0/$batch", batchRequestContent);

// Handle http responses using BatchResponseContent.
BatchResponseContent batchResponseContent = new BatchResponseContent(response);