TeamCity Api question

Hey guys

I use last version of teamcity and i need make some C# which can access to teamcity and grabb info
1) List of builds for project
2) For each build get artifact (download like a zip file)
3) For each build get chnages logs which TeamCity show from source control.



I have tied to use Sharp2City.dll from this site and it works, but i dont see how to get changes for selected build.