Macrix Technology Group .NET Developer interview questions

Received a call from HR and scheduled an online interview because of Covid19. Interview lasted between 90 and 120 minutes. First 30 minutes I just listened about the company, then got connected with one of the senior software developers and was asked loads of different questions about C# and .Net framework. Got to the next stage where I had to design an application in C#, had couple of days to finish it. I didn't get a job offer because of that assignment. It was not enough to just meet the specifications, of which I was not aware.