It seems that some work done in these commits, for the
file ForEachBuilderExtensions was responsible:
* 4807ace13c
* dfbba1e176
A couple of the extension methods were missing out a ToList()
which later caused an ArgumentException when setting a property
value via reflection.
I also added an extra exception for the set-value logic. This way,
if/when there is a problem, the exception will indicate which property
it was trying to set at the time.
