Commit migrated from https://github.com/dotnet/corefx/commit/3d6c09a9ac0b7f32964820334f00edc7fbec1e91

Shim the implicit machine.config into the runtime configuration.
It is a little ugly, but I don't want to change existing public
interfaces.

This starts adding a few tests and fixes a Save problem.

Commit migrated from https://github.com/dotnet/corefx/commit/4b273351aca17f98ed14c9f74620193874bdd682

Fixed minor typos, mostly escaping angle brackets in text

Commit migrated from https://github.com/dotnet/corefx/commit/b50c3f2dda1ddc56475681d8856aef222aa713e9

Update CoreClr, CoreFx, ProjectNTfs to beta-24827-03, beta-24827-01, beta-24827-00, respectively (master)

Commit migrated from https://github.com/dotnet/corefx/commit/01aba1de8d023c7945954b3019fd51995b2156ac

Fixes dotnet/corefx#14728


Commit migrated from https://github.com/dotnet/corefx/commit/4ebd69866265e719ef23a31080367dde011f7b0b

Fixes https://github.com/dotnet/corefx/issues/14725


Commit migrated from https://github.com/dotnet/corefx/commit/b58690e859dfdf46cb6327d4a9e29fa3cb160390

Commit migrated from https://github.com/dotnet/corefx/commit/f7f3a2ed0b236af4d7e77cbeb4c170a5b9c3f69d

Commit migrated from https://github.com/dotnet/corefx/commit/e0802d8b6010d4bb4538b15f228eee45378c4cc4

Optimize IsOverridden logic in DynamicObject

Commit migrated from https://github.com/dotnet/corefx/commit/49d22cabf3e34adb041d4c8e629b5c953afd67f9

Specialize the single-selector overload of SelectMany.

Commit migrated from https://github.com/dotnet/corefx/commit/5bf69d1efbb54ebd03dcc8c1f32a46f044130825

Ensure the selector gets run during Count.

Commit migrated from https://github.com/dotnet/corefx/commit/b879dc018f39fd716e34ef6a4fd4e81b25c528fd

Update S.L.E to compile when NO_FEATURE_STATIC_DELEGATE and FEATURE_MAKE_RUN_METHODS are defined

Commit migrated from https://github.com/dotnet/corefx/commit/25ea6f2ff5a91aa0d846c8c4a8c833514859cdee

* Enable full Encodings on Windows Console by Default

by default .NetCore doesn't enable the codepage encoding and the app has to opt-in to the full encoding through the call
	Encoding.RegisterProvider(CodePagesEncodingProvider.Instance)
This was not a good stand for the Console specially on Windows as the Console always using encoding which is not supported by default and we had to fallback using UTF8.
In this change we are supporting the full OS encoding on Console and System.Diagnostics.Process without bringing the big encoding size cost (which is 600+ KB). The way we support it is we create an OSEncoding class wrapper which will call the OS instead of using our own encoding data.
The only restriction we’ll have is cannot use encoding fallback with OSEncoding as this will be very slow and not intuitive. But this is acceptable as usually apps don’t use the console encodings for such fallback operation. But if anyone want to do that can still register the encoding provider and get full support.

* Add Encoder/Decoder to OSEncoding in Console

* fix misspelling

* Some fixes and adding tests

* Fix corner case when buffer has only one high surrogate char


Commit migrated from https://github.com/dotnet/corefx/commit/bb068f3be887ed34e7f8bedc4c12ec4284884441

BitArray shift operators

Commit migrated from https://github.com/dotnet/corefx/commit/851f91ee6a11f5efac1a770449e8fd88b948d651

Commit migrated from https://github.com/dotnet/corefx/commit/5c5e5fed00df115c921b2a03300564ab3acde32e

* Update Test section of developer guide

* Code review fixes

* Add missing parenthesis

* Add link


Commit migrated from https://github.com/dotnet/corefx/commit/c3ce1fb6fd0515866ab4f8b58942dfebf70a64de

Remove VSTS Symbol publish step from checked in definitions

Commit migrated from https://github.com/dotnet/corefx/commit/a111a97f4a0267bfbe94fb26cd58cbb6853d107e

* Support ISerializable in ReflectionOnly mode.

Fix dotnet/corefx#13071

* Address feedback.


Commit migrated from https://github.com/dotnet/corefx/commit/c573a141bbbd5d7027855890354668db99ae870c

Add tests for BitArray.Clone with large lengths

Commit migrated from https://github.com/dotnet/corefx/commit/1d4d1d8b00f09a8198a4e402ad91b48a85a59036

* Fix XmlSchemaTest in ReflectionOnly mode.

Fix dotnet/corefx#11918

* Adress feedback.


Commit migrated from https://github.com/dotnet/corefx/commit/5b4c955cf446cc735a45353d46261d5a6823a2fe

Commit migrated from https://github.com/dotnet/corefx/commit/3c0ff4ebfd98ef41edb78ea047f841e35a98e97b

Commit migrated from https://github.com/dotnet/corefx/commit/12d432ec6c84b8bab0e304274366a710a697c3f7

Update build tools

Commit migrated from https://github.com/dotnet/corefx/commit/39368bffa6476b2812114a2b178ae7675fa5bf57

Pick up version with improved VSTS Agent Cleanup behaviors

Commit migrated from https://github.com/dotnet/corefx/commit/8ebdad90e3041a06d038880e4f5744923ff3b6b5

Commit migrated from https://github.com/dotnet/corefx/commit/23072f49c1f7b8925d2e8a23ab00c933770f918e

Update ProjectN and CoreRT targeting packs

Commit migrated from https://github.com/dotnet/corefx/commit/6a027f80626127fdefb7043942364b14cae0412e

Commit migrated from https://github.com/dotnet/corefx/commit/7775cefe16f99cefccb3f6000aab267714af4bec

- Delete unused files
- Merge Strings.resx and Strings.netcore50aot.resx


Commit migrated from https://github.com/dotnet/corefx/commit/4f77b4be29bf946900fa1f40a6e52bf0bdc0a416

Commit migrated from https://github.com/dotnet/corefx/commit/6368ca6b6dfca7f4e6b28587a916f8bf55519f65

Dictionary<TKey, TValue> constructor that accepts IEnumerable (ref dotnet/corefx#1378)

Commit migrated from https://github.com/dotnet/corefx/commit/0ba8ac88588c274377f8a01a5228973c8584fb0b

Commit migrated from https://github.com/dotnet/corefx/commit/2c658fd1b048174b6bd3d36339644ef760cea2fc

Commit migrated from https://github.com/dotnet/corefx/commit/46be6bb9842a50efe782e335d57cb512ac2b6e3f

Typo'd space led to an ".cs .cs" ending.

Commit migrated from https://github.com/dotnet/corefx/commit/46830af0afa818e94b5b202c571150956c262fec

IEnumerable<KeyValuePair<TKey, TValue>

New constructor is added only for netcoreapp1.1


Commit migrated from https://github.com/dotnet/corefx/commit/f5b6f76f7992968586e3dced0e93d4412fdd38ad

Add support for building Portable Linux binaries/packages in pipeline

Commit migrated from https://github.com/dotnet/corefx/commit/ee128ff349cb94041dea8b8320caa06c822a361f

Commit migrated from https://github.com/dotnet/corefx/commit/ecb39dce58de72137c235161e177853a8f1a314d

Commit migrated from https://github.com/dotnet/corefx/commit/299b7a088c3c4cee824924106eba42bb147e65af

Generate packages for portable native build

Commit migrated from https://github.com/dotnet/corefx/commit/3bde7ed3a345d86c9eabf4ff33375e35727f49f2

Commit migrated from https://github.com/dotnet/corefx/commit/5107317070171ea361eb232d67419ce3dace9899

Commit migrated from https://github.com/dotnet/corefx/commit/22ab8bb16bfcb398dc469b899c5ec30ea8035c74