docs/sources/mono-api-image.html
Images are the component of assemblies that actually hold the CIL code and metadata in the extended PE/COFF file.
#include <metadata/image.h> typedef struct _MonoImage MonoImage; typedef enum { MONO_IMAGE_OK, MONO_IMAGE_ERROR_ERRNO, MONO_IMAGE_MISSING_ASSEMBLYREF, MONO_IMAGE_IMAGE_INVALID } MonoImageOpenStatus; @API_IDX@
Images are the actual elements in the runtime that contain the actual code being executed.