Replace SortedList with Generic.SortedList<TKey,TValue>

[xtqqczze]

PR Summary

PR Context

https://github.com/dotnet/platform-compat/blob/master/docs/DE0006.md

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
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• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
• This PR is ready to merge and is not Work in Progress.
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• Breaking changes
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• User-facing changes
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  • Documentation needed
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• Testing - New and feature
  • N/A or can only be tested interactively
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  • Make sure you've added a new test if existing tests do not effectively test the code changed
• Tooling
  • I have considered the user experience from a tooling perspective and don't believe tooling will be impacted.
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    • Impact on PowerShell Editor Services which is used in the PowerShell extension for VSCode (which runs in a different PS Host).
    • Impact on Completions (both in the console and in editors) - one of PowerShell's most powerful features.
    • Impact on PSScriptAnalyzer (which provides linting & formatting in the editor extensions).
    • Impact on EditorSyntax (which provides syntax highlighting with in VSCode, GitHub, and many other editors).

[TravisEz13]

/azp list

[azure-pipelines]

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[TravisEz13]

/azp run PowerShell-CI-macos

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Azure Pipelines successfully started running 1 pipeline(s).

[TravisEz13]

@PoshChan Please remind me in 1 day

[PoshChan]

@TravisEz13, this is the reminder you requested 1 day ago

[iSazonov]

@xtqqczze Please rebase to pass CIs.

[xtqqczze]

@iSazonov rebased

[ghost]

🎉v7.1.0-preview.4 has been released which incorporates this pull request.:tada:

Handy links:

• Release Notes