Yeh. They told me I'll be writing C#. Then I came up with the brilliant idea of letting users embed VB.NET macros in our application*. Now I spend 50% of my time writing VB.NET (uck!) for testing (then I realised there are programs out there I can copy C# code into and its spits out VB.NET - bliss).
Oh, and we use stylesheets for rendering parts of our (Windows Forms) application, so I spend another 25% writing XHTML/CSS/XSLT.
Theres a lot more things you'll be doing that aren't in the job description.
* Any Australians wanna hear how we did this, and it was really easy, come along to the next Sydney .NET Users Group where I'll be doing a presentation on it.