I did twenty or so Euler problems in Python a while back. I just started doing a few in C# to brush up for an interview. Forcing myself to write working progr

I did twenty or so Euler problems in Python a while back. I just started doing a few in C# to brush up for an interview. Forcing myself to write working programs is a really valuable complement to reading through C# in Depth; indeed, it's probably the other way around. Although I agree with another poster that Euler is a bit math heavy, being able to submit a single number to check your solution is handy. Google's foobar recruiting puzzle system actually tests your program, but it's limited to Python and Java.