One week after I was emailed by the recruiter, I had a short chat on the phone with her.

After that, a few days later, I was scheduled for a technical phone interview. The phone interview was way under my expectations:

• the interviewer seemed arrogant (he told me quite many details about himself and wasted time on this subject - like he was working 12 years for Microsoft and 3 years for Google, etc)
• there were no algorithms, data structures questions, etc - but a single language specific question instead.

Explain what's a C# enumerator, write a function to concatenate a list of enumerators and test this function.