Remove .NET Framework remarks (System.Configuration)

[gewarren]

.NET Framework API ref has moved to its own repo (https://github.com/dotnet/dotnetfw-api-docs), so we can clean up .NET Framework remarks, exceptions, and code examples out of this repo. Contributes to #12513.

Removes remarks and examples related to:

• .NET Framework versions
• Code-access security
• Configuring apps via app.config file
• App domains

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[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-system-configuration

[Copilot]

Pull request overview

This PR continues the repo-wide cleanup to remove .NET Framework-specific guidance from the System.Configuration API reference XML now that .NET Framework docs have moved to dotnetfw-api-docs. The changes primarily simplify remarks, remove .NET Framework–only links and examples, and adjust wording to be more .NET-centric.

Changes:

• Removed .NET Framework–specific remarks, related-article links (notably /dotnet/framework/...), and some legacy examples from System.Configuration XML docs.
• Updated wording to reduce .NET Framework/app-domain/CAS-specific phrasing and modernize some lists/formatting.
• Replaced several previously substantive remarks/examples with placeholders (for example, <remarks>To be added.</remarks>).

Reviewed changes

Copilot reviewed 28 out of 28 changed files in this pull request and generated 13 comments.

Show a summary per file

File	Description
xml/System.Configuration/UriSection.xml	Removes .NET Framework 2.0 upgrade notes and drops a .NET Framework “Network Settings Schema” related link.
xml/System.Configuration/SettingsSerializeAsAttribute.xml	Updates remarks wording; introduces “.NET standard” phrasing.
xml/System.Configuration/SettingsProvider.xml	Removes .NET Framework/CAS trust guidance and app-domain wording; reformats numbered lists.
xml/System.Configuration/SectionInformation.xml	Removes .NET Framework trust-level and ASP.NET-specific guidance from remarks.
xml/System.Configuration/SchemeSettingElementCollection.xml	Removes .NET Framework “Network Settings Schema” related link.
xml/System.Configuration/SchemeSettingElement.xml	Removes .NET Framework “Network Settings Schema” related links in multiple members.
xml/System.Configuration/RsaProtectedConfigurationProvider.xml	Replaces full remarks/examples with a “not supported” note and placeholders for member remarks.
xml/System.Configuration/ProtectedConfigurationProviderCollection.xml	Updates remarks wording from “.NET Framework” to “.NET”.
xml/System.Configuration/LocalFileSettingsProvider.xml	Updates remarks wording from “.NET Framework” to “.NET”.
xml/System.Configuration/IriParsingElement.xml	Removes .NET Framework upgrade notes and removes .NET Framework 2.0 compatibility phrasing.
xml/System.Configuration/IdnElement.xml	Removes .NET Framework upgrade notes and removes .NET Framework 2.0 compatibility phrasing.
xml/System.Configuration/IConfigurationSectionHandler.xml	Simplifies deprecation message to remove .NET Framework version specificity.
xml/System.Configuration/IApplicationSettingsProvider.xml	Updates remarks wording from “.NET Framework” to “.NET” (side-by-side execution guidance retained).
xml/System.Configuration/ExeConfigurationFileMap.xml	Removes related “Configuration Files” article link; adjusts remarks wording.
xml/System.Configuration/ConfigurationSettings.xml	Replaces detailed legacy/back-compat remarks with a placeholder.
xml/System.Configuration/ConfigurationSectionGroup.xml	Replaces extensive remarks/examples with a placeholder; updates targetFramework parameter text.
xml/System.Configuration/ConfigurationSection.xml	Removes legacy note about section handlers; updates targetFramework wording in serialization-related members.
xml/System.Configuration/ConfigurationProperty.xml	Updates “.NET Framework” phrasing to “.NET”; adjusts remarks wording/formatting.
xml/System.Configuration/ConfigurationPermissionAttribute.xml	Replaces method remarks with placeholder text.
xml/System.Configuration/ConfigurationPermission.xml	Removes descriptive remarks content and replaces some method remarks with placeholders.
xml/System.Configuration/ConfigurationManager.xml	Removes .NET Framework-specific assembly-reference/config-file remarks; refactors lists and updates Machine.config wording.
xml/System.Configuration/ConfigurationElement.xml	Removes large framework-era examples and reduces remarks; updates “.NET Framework” phrasing to “.NET”.
xml/System.Configuration/ConfigurationCollectionAttribute.xml	Updates constructor remarks to remove “.NET Framework” phrasing.
xml/System.Configuration/Configuration.xml	Removes .NET Framework-related article link and some framework-era remarks/examples; updates wording.
xml/System.Configuration/ClientSettingsSection.xml	Removes .NET Framework wording and reorders/condenses remarks.
xml/System.Configuration/AppSettingsSection.xml	Replaces type-level remarks/examples with a placeholder.
xml/System.Configuration/AppSettingsReader.xml	Replaces type-level remarks/examples with a placeholder (method-level examples remain).
xml/System.Configuration/ApplicationSettingsBase.xml	Removes app-domain wording from constructor remarks.

Comments suppressed due to low confidence (1)

xml/System.Configuration/ConfigurationPermission.xml:257

• The remarks for this method were replaced with the placeholder "To be added.", which will publish as-is. Either remove the element or restore a brief remark (for example, how null is treated or what type is expected for target) if it’s still useful.

        <param name="target">The object to compare to.</param>
        <summary>Compares the <see cref="T:System.Configuration.ConfigurationPermission" /> object with an object implementing the <see cref="T:System.Security.IPermission" /> interface.</summary>
        <returns>
          <see langword="true" /> if the permission state is equal; otherwise, <see langword="false" />.</returns>
        <remarks>To be added.</remarks>
        <exception cref="T:System.ArgumentException">

[Copilot]

Pull request overview

Copilot reviewed 28 out of 28 changed files in this pull request and generated 8 comments.

[BillWagner]

This LGTM. Let's