This is not a question we can answer.
All technologies are used (more or less... OK but anyways used). You are the one going to learn them, so... you need to learn what you like and is easy for you to understand.
If you are not sure about what to choose... the best advice I can give you is:
Check every language offered by your universtiy. There are thousands of manuals in the net, so you can get an overview and find out if you like it or if you can understand it easily.
Some links you can start with:
http://www.wpftutorial.net/[
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http://www.csharp-station.com/tutorial.aspx[
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http://www.w3schools.com/[
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http://www.cplusplus.com/doc/tutorial/[
^]