This chapter explained the advanced features of Web Performance Testing using Visual Studio. All the features covered in this chapter explained the customization of the web testing feature based on our requirements. Writing custom rules are the extension of the in-built Extraction and Validation rules that comes with the Web Performance Testing. And generating code out of the recorded Web Performance Testing gives more control to the tester to customize the testing. We can include looping, calling custom written methods between the requests, adding transactions for requests and adding additional data sources. Furthermore, we can copy and paste the same requests as often