* Quick review of the last copy

* Readd full url to the example

* Fix casing

* Add upgrade assistant docs

* Updates to arch guide for upgrade tool

* Update toc.yml

I had added the wrong ms.custom value

* update links to ECMA standards

ECMA launched an updated website early this year. This PR updates links to ECMA 334 (C#),  ECMA 335 (CLI), and TR-84 (XML data formats)

* fix build error.

Missing opening parenthesis in link.

Fixes #21691

- Clarify the rules for defensive copies

Fixes #22955

- Provide link to conceptual doc with examples.

Fixes #16187

The usage of synchronous Task-returning methods is not generally recommended.  See https://github.com/davidfowl/AspNetCoreDiagnosticScenarios/blob/master/AsyncGuidance.md#prefer-asyncawait-over-directly-returning-task

The examples were valid, but can cause hard-to-diagnose issues.

As we add more advanced async scenarios, this scenario belongs there, with more details about when it is and isn't appropriate. (`using` in the non-async method is the primary mistake to run into).

…ions (#23007)

`GenEnvVariable` didn't appear in csharp/tutorials/AsyncStreams/start/IssuePRreport/IssuePRreport/Program.cs . so I think it's typo,
I'm just getting start in c# and not sure this should be `GetEnvVariable`. Some of issue mention GetEnvVariable and didn't say it's typo , so sorry if it's already correct. Also sorry for my suck English.

* Discards article: Fix the section about the discard pattern

* Update docs/csharp/discards.md

Co-authored-by: Bill Wagner <[email protected]>

Co-authored-by: Bill Wagner <[email protected]>

[C# Reference] URL is wrong.
It's same with [C# Programming Guide] URL as above.

Bumps [MSTest.TestAdapter](https://github.com/microsoft/testfx) from 2.1.2 to 2.2.1.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Commits](microsoft/testfx@v2.1.2...v2.2.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 2.1.2 to 2.2.1.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Commits](microsoft/testfx@v2.1.2...v2.2.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 2.1.2 to 2.2.1.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Commits](microsoft/testfx@v2.1.2...v2.2.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [MSTest.TestAdapter](https://github.com/microsoft/testfx) from 2.1.2 to 2.2.1.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Commits](microsoft/testfx@v2.1.2...v2.2.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [MSTest.TestAdapter](https://github.com/microsoft/testfx) from 2.1.2 to 2.2.1.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Commits](microsoft/testfx@v2.1.2...v2.2.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [MSTest.TestAdapter](https://github.com/microsoft/testfx) from 2.1.2 to 2.2.1.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Commits](microsoft/testfx@v2.1.2...v2.2.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 2.1.2 to 2.2.1.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Commits](microsoft/testfx@v2.1.2...v2.2.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [Microsoft.CodeAnalysis](https://github.com/dotnet/roslyn) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/master/docs/Breaking%20API%20Changes.md)
- [Commits](dotnet/roslyn@v3.8.0...v3.9.0)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [Microsoft.CodeAnalysis.CSharp.Workspaces](https://github.com/dotnet/roslyn) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/master/docs/Breaking%20API%20Changes.md)
- [Commits](dotnet/roslyn@v3.8.0...v3.9.0)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [Microsoft.CodeAnalysis.CSharp.Workspaces](https://github.com/dotnet/roslyn) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/master/docs/Breaking%20API%20Changes.md)
- [Commits](dotnet/roslyn@v3.8.0...v3.9.0)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [Microsoft.CodeAnalysis.CSharp.Workspaces](https://github.com/dotnet/roslyn) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/master/docs/Breaking%20API%20Changes.md)
- [Commits](dotnet/roslyn@v3.8.0...v3.9.0)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Fix non compliable code

The sample code doesn't compile.

* Update docs/core/diagnostics/distributed-tracing.md

Co-authored-by: Youssef Victor <[email protected]>

* Apply suggestions from code review

Co-authored-by: Youssef Victor <[email protected]>

Co-authored-by: Youssef Victor <[email protected]>
Co-authored-by: Bill Wagner <[email protected]>

Bumps [Microsoft.CodeAnalysis.CSharp.Workspaces](https://github.com/dotnet/roslyn) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/master/docs/Breaking%20API%20Changes.md)
- [Commits](dotnet/roslyn@v3.8.0...v3.9.0)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Regex lookaround information updated

Information in the regular expression grouping table added as discussed in #22282 (comment)

* Update docs/standard/base-types/regular-expression-language-quick-reference.md

Co-authored-by: Andy De George <[email protected]>

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.8.3 to 16.9.1.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](microsoft/vstest@v16.8.3...v16.9.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.8.3 to 16.9.1.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](microsoft/vstest@v16.8.3...v16.9.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [coverlet.collector](https://github.com/coverlet-coverage/coverlet) from 3.0.2 to 3.0.3.
- [Release notes](https://github.com/coverlet-coverage/coverlet/releases)
- [Commits](https://github.com/coverlet-coverage/coverlet/commits)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [coverlet.collector](https://github.com/coverlet-coverage/coverlet) from 3.0.2 to 3.0.3.
- [Release notes](https://github.com/coverlet-coverage/coverlet/releases)
- [Commits](https://github.com/coverlet-coverage/coverlet/commits)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Remove leading space.

fix typo:  "communicates over name*d* pipes" not name*s* pipes

The project's name is error

Noticed an extra ) when reading the doc.

* Update Fedora docs for .NET 5.0

.NET 5.0 is now available in the default Fedora repositories. Update
docs to make that clearer.

* Update docs/core/install/linux-fedora.md

These links are wrong since they were taken from ./includes/ folder

Co-authored-by: Andy De George <[email protected]>

* Update docs/core/install/linux-fedora.md

These links are wrong since they were taken from ./includes/ folder

Co-authored-by: Andy De George <[email protected]>

* Add zlib as a Linux/RPM dependency

Co-authored-by: Andy De George <[email protected]>

* Remove unclear hosting model language

Fixes #20073

* Update docs/architecture/blazor-for-web-forms-developers/hosting-models.md

* Update deploy-with-cli.md

The "--self-contained false" switch is actually added to prevent creation of self contained deployment ( which, in addition to the application and its dependencies, also  includes the dotnet runtime and libraries ).  Self contained deployment  is the default when -r switch is used with dotnet publish command.

* Update docs/core/deploying/deploy-with-cli.md

Co-authored-by: Andy De George <[email protected]>

Co-authored-by: Andy De George <[email protected]>

* Add missing semi colon

* Add using

* Fix

* Fix VB sample

* correction to exposing data with cachemetadata doc

* update Additional resources request per 22585

Co-authored-by: Ryan Hutton <[email protected]>

* Update remove-runtime-sdk-versions.md

* Update remove-runtime-sdk-versions.md