I wouldn't imagine .NET experience would be a negative at Microsoft. In fact .NET seems to main language used by a lot of large companies UK. In fact some bigg

I wouldn't imagine .NET experience would be a negative at Microsoft. In fact .NET seems to main language used by a lot of large companies UK. In fact some biggest e-commerce sites and well funded startups(JustEat, Purplebricks) in the UK use .NET. These sorts of companies tend use things like DDD, CQRS, Event Sourcing which a lot of developers at "local" companies don't really use.