Merge pull request dotnet/corefx#9850 from joperezr/SystemCore
authorJose Perez Rodriguez <joperezr@microsoft.com>
Tue, 5 Jul 2016 17:54:33 +0000 (10:54 -0700)
committerGitHub <noreply@github.com>
Tue, 5 Jul 2016 17:54:33 +0000 (10:54 -0700)
Adding types/members to System.Core surface area that were introduced in Core.

Commit migrated from https://github.com/dotnet/corefx/commit/6bbf0f16f46cf8d502379550046c9b4d5c758f11


Trivial merge