Async Sample: Asynchronous programming with async and await in C#

Added sync, serial-async, and parallel-async examples (#3819)

* Added sync, async, and parallel examples

* Finalize working bits, reorganize, etc.

* Drawing a line in the sand... thinking this is nearly done

* Added sync, serial-async, and parallel-async examples.

* Update to .NET 5

* Undo diagnostic changes, that were unintended.

* Oops, missed these...

* Added VB counterparts.

* Updates to the README

Async Sample: Asynchronous Programming with Async and Await

Added sync, serial-async, and parallel-async examples (#3819)

* Added sync, async, and parallel examples

* Finalize working bits, reorganize, etc.

* Drawing a line in the sand... thinking this is nearly done

* Added sync, serial-async, and parallel-async examples.

* Update to .NET 5

* Undo diagnostic changes, that were unintended.

* Oops, missed these...

* Added VB counterparts.

* Updates to the README

Diagnostic scenarios sample debug target

Bump Microsoft.AspNetCore.Mvc.NewtonsoftJson (#3821)

Bumps [Microsoft.AspNetCore.Mvc.NewtonsoftJson](https://github.com/aspnet/AspNetCore) from 3.1.6 to 3.1.7.
- [Release notes](https://github.com/aspnet/AspNetCore/releases)
- [Commits](https://github.com/aspnet/AspNetCore/compare/v3.1.6...v3.1.7)

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Azure Identity, Resource Management, and Storage sample

Bump Azure.Identity in /azure/sdk-identity-resources-storage (#3817)

Bumps [Azure.Identity](https://github.com/Azure/azure-sdk-for-net) from 1.1.1 to 1.2.0.
- [Release notes](https://github.com/Azure/azure-sdk-for-net/releases)
- [Commits](https://github.com/Azure/azure-sdk-for-net/compare/Azure.Identity_1.1.1...Azure.Identity_1.2.0)

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Order .NET Core unit tests

Bump Microsoft.NET.Test.Sdk (#3791)

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.6.1 to 16.7.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](https://github.com/microsoft/vstest/compare/v16.6.1...v16.7.0)

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Order .NET Core unit tests

Bump Microsoft.NET.Test.Sdk (#3791)

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.6.1 to 16.7.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](https://github.com/microsoft/vstest/compare/v16.6.1...v16.7.0)

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.NET Core unit testing code coverage

Bump Microsoft.NET.Test.Sdk (#3791)

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.6.1 to 16.7.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](https://github.com/microsoft/vstest/compare/v16.6.1...v16.7.0)

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Order .NET Core unit tests

Bump Microsoft.NET.Test.Sdk (#3795)

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.6.1 to 16.7.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](https://github.com/microsoft/vstest/compare/v16.6.1...v16.7.0)

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

.NET Core unit testing code coverage

Bump Microsoft.NET.Test.Sdk (#3795)

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.6.1 to 16.7.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](https://github.com/microsoft/vstest/compare/v16.6.1...v16.7.0)

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Order .NET Core unit tests

Bump xunit.runner.visualstudio (#3766)

Bumps [xunit.runner.visualstudio](https://github.com/xunit/visualstudio.xunit) from 2.4.2 to 2.4.3.
- [Release notes](https://github.com/xunit/visualstudio.xunit/releases)
- [Commits](https://github.com/xunit/visualstudio.xunit/compare/v2.4.2...v2.4.3)

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