Compiler Error C3862
'function': cannot compile an unmanaged function with /clr:pure or /clr:safe
A compilation with /clr:pure or /clr:safe will produce an MSIL only image, an image with no native (unmanaged) code. Therefore, you cannot use the unmanaged pragma in a /clr:pure or /clr:safe compilation.
For more information, see /clr (Common Language Runtime Compilation) and managed, unmanaged.
Example
The following sample generates C3862:
// C3862.cpp
// compile with: /clr:pure /c
#pragma unmanaged
void f() {} // C3862