If you run ildasm.exe on it (say the 2.0 FW version) the exe's manifest will
show you compiler-inserted dependencies on mscorlib and system, and these
versions will be 2.0 for the 2.0 framework, 1.0.5000 for the 1.1 framework,
and 1.0.3300 (IIRC) for the 1.0 framework.