C# or C++/CLI?

Advantages of C#

• no cpp/h, just one file
• better IDE support:
• better intellisense
• code auto-complete
• refactoring (auto rename, method extraction, ...)
• code snippets
• compile errors displayed as you type
• no, it's not Microsoft proprietary, there is an ECMA standard for it.

Advantages of C++/CLI

• support for mixing managed and unmanaged code. Excellent for re-use of legacy code.
• cool language extensions (e.g. for each, ...)
• no, it's not Microsoft proprietary, there is an ECMA standard for it

Articles:

• C++ Interop is for the Performance Minded Developer