Migrate System.Linq.Parallel to Protobuild
Migrate XML projects to Protobuild
Migrate XML tests to Protobuild
Migrate XPath tests to Protobuild
Remove old XML projects
Migrate Microsoft.Win32.Registry to Protobuild
Migrate System.Diagnostics libraries to Protobuild
Migrate System.Numerics.Vectors to Protobuild
Migrate System.Reflection.Metadata to Protobuild