1. When Error Occurs, there are often error status codes, these are very important for error analysis. However when Exception happens, it returns a default null object and return and omit the error.

2. HttpProvider Class SendAsync method, when error occurs, it drop out the response and customize some hand-made errors, Graph with send some analysis messages in the response body along with status code when error happens, if you drop out these messages, these error details are dropped out!

Expected behavior

1. Append raw response into ServiceException, and let it pop up to user level.

Actual behavior

1. call api will always return a good value or a null value.

Steps to reproduce the behavior

1. Every call to api