First python, then C#

My current plan is to finish learning python, and then learn C# for game development. Is this a good plan or should I bite the bullet and learn C++ instead? My plan isn't to do 3d games, more like Super Metroid, but can I randomize maps and such well with C#? I guess my question is, is C# a powerful enough language?

>>32
CPython being a bit slow
You're too euphemistic. FIOC is SaF.

Typical C# game: http://www.youtube.com/watch?v=GNYLA_xDOos
Typical C or C++ game: http://www.youtube.com/watch?v=XkSLs9qZj-g