Regardless of whether it is right or wrong, it is still the defacto standard to use Hungarian Notation for naming controls, and it seems very out-of-place not to adopt it. In the same way that methods in .NET languages use Pascal Casing (while in most other languages it is frowned upon), stepping outside of the accepted conventions for the environment you're working in just tends to make your code look even more out-of-place.
I am personally in favour of the practise, as it helps to distinguish class members which are part of the user-interface (view) from those members which are part of the code-behind (model/controller). If the control variables are given similar-looking names to those used to store data, state, etc then I feel as though it is harder to resist the temptation to tightly couple the two. Of course, a more distinct separation of logic would overcome that as well.
Nevertheless, Hungarian Notation leaves no doubt as to which variables are part of the user-interface, and also makes clear as to their type and function, both in the designer and the code editor.