OPLOG interview questions

The recruiter contacted me via LinkedIn. We did a 30-minute meeting and talked about the role and company. She said there would be a tech interview at the second step and a C-level interview at the 3rd level. But, I got rejection mail after almost 1 week. I was expecting to go through the next step, it was an unexpected decision. Probably, my lack of C#/.Net experience played an important role in this decision.