I also suggest to just apply to more companies, for example try 10 at first and see what they told you. C# is pretty much in demand, so it should not be a problem to get a junior programmer job.

But maybe don't be too romantic about a job in software company...you could very well find that it also isn't a ideal job...you will perhaps fight with bureaucracy, being forced to do dull work, etc. etc.

So before quiting your job, try to think really deep why exactly you don't like your current job. Maybe it is something more fundamental, and ordinary software company might also not fix it. Anyway, good luck, finding a software programmer job is certainly achievable.