编译.NET程序集时,名称中包含x__的类是什么？

{"error":{"code":"429","message": "Requests to the Creates a completion for the chat message Operation under Azure OpenAI API version 2023-05-15 have exceeded token rate limit of your current OpenAI S0 pricing tier. Please retry after 2 seconds. Please go here: https://aka.ms/oai/quotaincrease if you would like to further increase the default rate limit."}}