> (load "Lib/MzScheme/dotnet-ffi.sch")
> (load "Lib/MzScheme/dotnet.sch")
> (enable-dotnet!)

Initializing dotnet........done.

> System.Object.class
#<System.RuntimeType System.Object>
> (.GetType System.Object.class)
#<System.RuntimeType>
> (define x (Scheme.Rep.Factory.makeFixnum 17))
> (.intValue x)

17

> (.value$ x)

17

> (set-.value$! x 24)

Error: CLR-INSTANCE-FIELD-SETTER not found: value