Update DualMode default

[gewarren]

Fixes https://dev.azure.com/devdiv/DevDiv/_workitems/edit/1257491.

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[opbld34]

Docs Build status updates of commit b9e944a:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Net.Sockets/Socket.xml	✅Succeeded	View

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[antonfirsov]

Small suggestions to be more accurate with terminology.

Shouldn't we also document the NotSupportedExceptions? (Note: we may want to remove the exception being thrown from the getter in .NET 6.0, so it might make sense to defer that work until that point.)

[antonfirsov]

Actually, to really fix the doc issue posted on the Azure DevOps, we need to document the exception behavior as well. We can change the docs later if we decide to alter the behavior for .NET 6.0.

The current behavior:
an attempt to get set the property on a non-IPv6 socket will throw NotSupportedException.

[opbld34]

Docs Build status updates of commit d74c277:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Net.Sockets/Socket.xml	✅Succeeded	View

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

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[antonfirsov]

Noticed one minor mistake, otherwise looks good.

[opbld30]

Docs Build status updates of commit 18c7a4a:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Net.Sockets/Socket.xml	✅Succeeded	View

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

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• Post your question in the Docs support channel

[antonfirsov]

LGTM, 18c7a4a can be reverted.

[opbld32]

Docs Build status updates of commit 0728255:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Net.Sockets/Socket.xml	✅Succeeded	View

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel