Visual Studio 2012 has a pretty good code coverage tool. I have used it to measure code coverage of a web service.

It is easy to integrate into build systems, you have out of the box support for TeamBuild (the TFS build) - see a more detailed article here.

According to msdn it has result merging.

Code coverage is also integrated in Microsoft Test Manager, so you can have manual testers do a round of testing on your service and at the end see how much of the code they actually hit.

Feb 10 2016 Update

For the .net world mstest continues to provide code coverage. We also worked on integrating the Microsoft build technologies (msbuild, TeamBuild and the new TFS Build) with SonarQube.

https://blogs.msdn.microsoft.com/visualstudioalm/2015/08/24/build-tasks-for-sonarqube-analysis/

Btw, TFS build also supports Java builds (via Maven, Ant and Gradle) and you can enable code coverage there. For Maven you even enable SonarQube analysis.

Original answer

Visual Studio 2012 has a pretty good code coverage tool. I have used it to measure code coverage of a web service.

It is easy to integrate into build systems, you have out of the box support for TeamBuild (the TFS build) - see a more detailed article here.

According to msdn it has result merging.

Code coverage is also integrated in Microsoft Test Manager, so you can have manual testers do a round of testing on your service and at the end see how much of the code they actually hit.