I had 7 years of C# experience in 2015 when I had to make an unanticipated job change. With some trepidation, I took a position with another company in the same industry whose codebase was all vb.net. I used Telerik's code converter a lot to bootstrap my proficiency with vb syntax. The boss said I could just write in C# if I wanted to, but I saw no need to make more mental work for the rest of the team.