Can't find a business co-founder? That's pretty unusual it seems. What kind of work do you expect your business co-founder to do?
1. Location. In Bristol, United Kingdom. Not London.
2. The .NET scene isn't very startup focused. Of all the .NET usergroup events I've attended (in Bristol) over the years I've only seen 1 person talking about their startup needing developers.
3. I scare other .NET (501) people with all these new hipster technologies like NoSQL (RavenDB, Redis) or cloud servers.