How often C# and VB.NET is used to create Data Entry application?

Question

Hi, my name is Rio, and I am from Indonesia.

I currently writing thesis for my graduation. My thesis is about
programming language used to create application for entering data
survey's result. I want to know how often C# and VB.NET is used to do that. It
would be nice if you could add some references for me to begin my
research. Thanks.