MethodImpl(AggressiveInlining) - how aggressive is it?

Question

So I was having a bit of a look at the MethodImplAttribute and I came across MethodImplOptions.AggressiveInlining which is described as:

The method should

Answer 1

MethodImplAttributes.AggressiveInlining compiles to a flag in the ImplFlags column of the MethodDef metadata table (ECMA-335 Partition II §22.26). The values for this attribute are listed in Partition II §23.1.11, but AggressiveInlining is undocumented (no value exists in the table for 0x0100).

During the compilation process, the compiler removes the attribute itself from the metadata. The disassembler must implement special logic to add the attribute back if the 0x0100 bit is set in the ImplFlags for a method.