There was all 3 rounds followed by HR round.
1st round was all about you, your experience with technologies mentioned in your resume. Also, they deep down to SDLC/delivery/Quality/Release processes followed in your organization. Then couple of scenario based questions.
2nd round was System online test mostly consists of C# logical programmings to guess the output.(Questions were too tricky to crack if you do not have very good understanding in programming features)
3rd round was again a kind of technical similar to first one. it is like they cross check the candidate with some more technical questions.
HR round is all about your negotiations