[adegeo] Update freshness 1

[adegeo]

Updating a bunch of freshness articles. I stopped when I ran into one that needed more work.

• parsing-datetime.md is the only one that has a lot of changes in it, along with its code files

fixes #27562

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Internal previews

📄 File	🔗 Preview link
docs/core/install/linux-snap-runtime.md	Install .NET Runtime with Snap
docs/core/install/macos-notarization-issues.md	Working with macOS Catalina Notarization
docs/standard/base-types/parsing-datetime.md	Parse date and time strings in .NET
docs/standard/datetime/how-to-use-dateonly-timeonly.md	docs/standard/datetime/how-to-use-dateonly-timeonly
docs/standard/datetime/timeprovider-overview.md	What is TimeProvider?

[Copilot]

Pull request overview

This pull request updates documentation freshness by updating timestamps and code snippets across multiple .NET documentation files. The primary focus is a comprehensive rewrite of the parsing-datetime.md article to include DateOnly and TimeOnly parsing examples alongside the existing DateTime parsing documentation.

Changes:

• Updated parsing-datetime.md with modern parsing examples for DateTime, DateOnly, and TimeOnly types
• Added new comprehensive code snippets demonstrating parsing across C# and Visual Basic
• Updated target frameworks from net8.0/net9.0 to net10.0 across multiple sample projects
• Updated timestamps to 01/16/2026 for freshness
• Added framework availability table to timeprovider-overview.md
• Removed obsolete conversion sample code files that are no longer referenced

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
docs/standard/base-types/parsing-datetime.md	Major rewrite expanding from DateTime-only to include DateOnly and TimeOnly parsing, with AI-assisted disclosure
docs/standard/base-types/snippets/parsing-datetime/csharp/Program.cs	Added comprehensive new C# code examples for all three date/time types
docs/standard/base-types/snippets/parsing-datetime/vb/Program.vb	Added comprehensive new VB code examples for all three date/time types
docs/standard/base-types/snippets/parsing-datetime/csharp/parsing-datetime.csproj	Updated target framework to net10.0
docs/standard/base-types/snippets/parsing-datetime/vb/parsing-datetime.vbproj	Added new project file targeting net10.0
docs/standard/datetime/timeprovider-overview.md	Added framework availability table and minor wording improvements, updated timestamp
docs/standard/datetime/snippets/timeprovider-overview/csharp/myproject.csproj	Updated target framework to net10.0
docs/standard/datetime/snippets/timeprovider-overview/vb/myproject.vbproj	Updated target framework to net10.0
docs/standard/datetime/snippets/how-to-use-dateonly-timeonly/csharp/dateonlytimeonly.csproj	Updated target framework to net10.0
docs/standard/datetime/snippets/how-to-use-dateonly-timeonly/vb/dateonlytimeonly.vbproj	Updated target framework to net10.0
docs/standard/datetime/how-to-use-dateonly-timeonly.md	Updated timestamp to 01/16/2026
docs/core/install/macos-notarization-issues.md	Updated timestamp to 01/16/2026
docs/core/install/linux-snap-runtime.md	Updated timestamp to 01/16/2026
samples/snippets/csharp/how-to/conversions/StringToDateTime.cs	Removed obsolete file no longer referenced in docs
samples/snippets/csharp/how-to/conversions/Program.cs	Removed obsolete file no longer referenced in docs
samples/snippets/visualbasic/how-to/conversions/Program.vb	Removed obsolete file no longer referenced in docs
samples/snippets/visualbasic/how-to/conversions/conversions.vbproj	Removed obsolete file no longer referenced in docs