in dotnet/azure-functions/FunctionApp/Notes.cs [156:165]
private static async Task<Note> SaveNote(string content)
{
Note note = new Note
{
Id = Guid.NewGuid().ToString(),
NoteText = content
};
ItemResponse<Note> response = await Container.CreateItemAsync(note, new PartitionKey(note.Id));
return response.StatusCode == System.Net.HttpStatusCode.Created ? note : null;
}