C#...
It's not really a C language though. C and C++ are dead as far as career paths though unless you write drivers or video games, but good luck finding any opportunities there. They won't let you put a foot in the door unless you have had previous experience.
C# is more accepted as business development though.
C# is a dot net language, which uses the dot net framework. It's not really much different than a VB.Net (which I'd also learn if you go that route as they are similar)... Basically C# is more C type syntax (semi colons at the end of the lines, etc) version of what you'd find in VB.net.
EDIT: I see alot of jobs out there using AJAX, ASP.net (which is developed in C# or VB.net) and Javascript these days (those combined). Web programming in general seems to be the highest demand last time I looked.
There is a reason that C++ is still used even though it was released in 1985. It is also supported on more platforms than just MS Windows (which when you start programing you will realize there are a lot more things out there than Windows). If you want a career as a programmer, you want to learn C/C++, because then you can write programs that run on phones, calculators, GPS systems, cars, mainframes, Windows, Mac, iPad, iPOD, linux, Solaris, AIX, HP-UX, IRIX, minix, micro-controllers.... The list goes on. Industries like Defense, Aerospace, Chemical, Pharmaceutical, Bio-tech, and Finance (just to name a few) all require programmers who can program in C/C++ because the "big iron" and cluster computers don't typically run Windows (only 5 systems on the Top500 supercomputers even use Windows within it, and NONE use Windows as the sole operating system, they are just a portion of systems that has Windows on them).