Once VC++ 2005 is out, C++/CLI lets you do everything C# does + lots more
(managed templates, mixed mode, STL.NET, stack semantics etc.)

But since C++/CLI is still in beta, currently it's C# that'll get you a job.

A major difference between the languages is that C# is strictly tied to .NET
whereas C++ is not. Using C++, you have the ability to develop applications
that are completely independent of the .NET Framework. In Visual Studio,
you'll note many templates available for C++ which are not dependent on the
.NET Framework (Win32 and MFC, etc.) where C# templates all depend on .NET.
So, the question becomes what *kind* of commercial applications are we
talking about?
If you're talking about .NET applications, Nishant's comments apply, and you
should especially note that VS 2005 brings major new features for C++ .NET
development.

They're two different languages, both descended from C.

Which one is better depends on who's using them.  If you know neither, then
you should probably use C#, since it's easier to learn and harder to shoot
yourself in the foot.

C++ is the only .NET language that can produce both native (x86) and managed
(IL) code and transition freely between the two domains.  If your
application involves a lot of interoperation with existing native code, then
C++ is likely your best choice.

C++ is also the only Visual Studio .NET language that can generate pure
native applications, so if you need to distribute an app with no
dependencies on the .NET framework, then C++ is your only choice (within
VS).

-cd