A continuous integration server should only have a minimal toolset installed. This ensures that no unwanted libraries could affect the build and other steps.
Clearly that with this slogan also StyleCop should not be installed to the CI server. But we wanna have this analysis as an part of the whole build.
First at all we need the necessary files from StyleCop (the core assemblies and the target).
The easiest way is to download the MSI of StyleCop, install the software and copy the relevant artifacts to a tools folder in our developer tree.
For a default installation you will find the assemblies under the program files folder and the target file under the MSBuild folder. You could copy all together to one folder.
Now deinstall the software to ensure, that your project local environment works (no impact from installed stuff).
Configure your environment
To run StyleCop from the target file it must be edited. Change the third line
<UsingTask AssemblyFile="$(ProgramFiles)\StyleCop 4.6\StyleCop.dll" TaskName="StyleCopTask"/>
<UsingTask AssemblyFile="StyleCop.dll" TaskName="StyleCopTask"/>
Configure your csproj files
In the last step we bore up all csproj files of our solution. Next to the c#-compile target we call the StyleCop target:
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
<Import Project="..\..\..\tools\StyleCop\StyleCop.targets" />
Take care to adjust the correct relativ folder from csproj- to target- file.