Overview
Microsoft is committed to maintaining compatibility. To help achieve this, the .NET Framework Code Coverage Edition enables you to give Microsoft direct feedback on what portions of the .NET Framework and Win32 you"re most reliant on. It allows you to collect and upload data on how .NET Framework and Windows code is used by managed applications and components that you have developed. By opting in, Microsoft provides you an instrumented version of the .NET Framework containing a tool that collects the code usage information behind the scenes. All you have to do is exercise your code under the watch of this tool, then save and send the data.
By participating and providing an email address, Microsoft may contact you when later versions of the .NET Framework are released with information about code changes that are likely to impact your applications/components. Microsoft can also prioritize testing, compatibility efforts, and feature planning based on areas of the product that are heavily used by customers such as you. The .NET Framework Code Coverage Edition is to be used for testing purposes only. It should not be used in a production environment. After installing it and collecting/uploading your data according to these instructions, you should uninstall it.