Write Assert fail differences to Excel or text file Selenium C

Question

I am using selenium  with C#

I have Number of asserts in my test case, is there a way i can write the assert fail to a file, text file or excel.

Lets say assert fails, I want  the actual and expected to  automatically written in the Excel.

Any help will be appreciated

Comments

Hey, why don't use the logging feature of TestNG? It's very easy to generate your own reports with TestNG with Listeners and Reporters