FxCop is an application that analyzes managed code assemblies (code that targets the .NET Framework common language runtime) and reports information about the assemblies, such as possible design, localization, performance, and security improvements. FxCop generates an XML results file which can be imported to generate findings.
For more details, refer to https://msdn.microsoft.com/en-us/library/bb429476(v=vs.80).aspx.