Add WriteCodeFragment build task#3702

Merged

KevinRansom merged 2 commits intodotnet:masterfrom

brettfo:writecodefragment

Oct 17, 2017

Commits on Oct 16, 2017

add WriteCodeFragment build task for assembly-level attribute generation
brettfo
committed
move InternalsVisibleTo to the project files where possible
brettfo
committed