Is there an option to invoke managed code from unmanaged without

Hi All,

I was wondering if there is an option to invoke managed code from
unmanaged code (c/c++) without the need to expose the .NET code as
COM.
What I'm looking for is an in-process option to call managed code from
unmanaged code but without the overhead of COM usage, and COM coding
(interfaces attributes GUID etc) in .NET.

Thx,

Guy