Can I use Visual Studio Command Prompt with the free Visual C# Express?
The Visual Studio Command Prompt is referenced here:
Run 'Visual Studio Command Prompt (2010)' (or 'Visual Studio x64 Win64 Command Prompt (2010)' if you are on a x64 operating system) in the Microsoft Visual Studio 2010 \ Visual Studio Tools menu as administrator.
An unreferenced forum post claims it is not available in Express, and lives in \Program Files\Microsoft Visual Studio 8\VC\vcvarsall.bat. The bat file name suggests it may just open a command prompt or PowerShell with a few environment variables, so maybe it is easy to reproduce even without the expensive Visual Studio?