FluentTc is a .NET library that allows integration with TeamCity via REST API or from a build step.
General information:
FluentTc is an open source project that is released under Apache 2.0 license. It was first released in 2015 and keeps releasing new version contributed by the community.
Tagging recommendation:
It is recommended to use the fluenttc tag together with the teamcity and c# tags
Resources:
FluentTc project on GitHub
FluentTc documentation
FluentTc package on nuget