Why the heck don't you ask your Developer?? What does he say? If he really is fluent in ASP.NET, then he should know the ins and outs of it, especially for WebA

Why the heck don't you ask your Developer?? What does he say? If he really is fluent in ASP.NET, then he should know the ins and outs of it, especially for WebApps, no? And nothing can stop your freedom to code in ASP.NET or anything else! Don't let prejudices infect your decision.