JetBrains dotCover is a .NET unit test runner and code coverage tool that integrates with Visual Studio.

It is a part of the JetBrains .NET tools family that also includes ReSharper, dotTrace, and dotPeek.

dotCover features include:

• Reporting statement-level coverage in .NET Framework and Silverlight applications.
• Integration with Visual Studio 2005, 2008, 2010, 2012.
• Highlighting for covered and uncovered code in Visual Studio.
• Detecting which tests cover a particular location in code.
• Managing and running unit tests with ReSharper's
  unit test runner or dotCover's own.
• Support for multiple unit testing frameworks: MSTest, NUnit, xUnit, and MSpec.
• Console utility to use with a Continuous Integration server. In fact, a server-side version of dotCover is built into TeamCity and available free of charge.
• Fetching coverage analysis data from TeamCity to Visual Studio.
• Generating code coverage reports as XML, HTML, or JSON.