Language Support: Custom Build/Debug actions

Hi!

I'm trying to develop a custom language service, but can't find a way how to register custom build action instead of default C# compiler. I followed this two (Language Service,Basic Project System) walkthroughs, but unfortunately couldn't find any more additional and up to date resources.

I am pretty confident that of the problems lies in the line of code bellow, but don't know how to correctly change it to register custom tool or ideally method call on build action.

<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />

If someone could please point me in the right direction.

Thanks!