or Builder Well I got a Beginning in C book, but I only got Microsoft Visual C++ Express Edition. Would that work? Or is there a place to download C compiler or Builder
Yes, that'll compile it for you, unless you specifically mean C (and not C++). If you do, then try gcc: http://gcc.gnu.org/ EDIT: meh. You'll probably need Cygwin or MingGW or something to run gcc. Or get a Linux/UNIX distro, which will be a much better environment to learn C (or C++) in anyway.
I used dev c++ for a while, I'll get a link for it: http://www.bloodshed.net/devcpp.html It's pretty good, you may try your lucking using that one. It should do C# as well.
If you would have read the first line in the link he gave you, you would have seen that it's a C/C++ compiler. The '/' means "and" in this case. P.S. What makes you want to learn C over C++ or C#? (Just curious)