Fix DBNull description: missing value vs. nonexistent column

[Copilot]

The Visual Basic Nothing keyword reference incorrectly described DBNull as representing "a nonexistent database column." DBNull actually represents a missing (null) value within an existing column.

Change

• docs/visual-basic/language-reference/nothing.md: Updated the DBNull description from "a nonexistent database column" to "a missing value in a database column."

Original prompt

---

This section details on the original issue you should resolve

<issue_title>DBNull represents a missing bvalue, not a "nonexistent database column"</issue_title>
<issue_description>### Type of issue

Other (describe below)

Description

Apologies for the accidedental submission of an incomplete form a minute ago.
The sentence just above See Also reads:
"Nothing differs from the DBNull object, which represents an uninitialized variant or a nonexistent database column."
it should be
"Nothing differs from the DBNull object, which represents an uninitialized variant or a missing value in a database column."

Page URL

https://learn.microsoft.com/en-us/dotnet/visual-basic/language-reference/nothing

Content source URL

https://github.com/dotnet/docs/blob/main/docs/visual-basic/language-reference/nothing.md

Document Version Independent Id

36611596-bb82-4165-9621-634728529908

Platform Id

368d0e44-741e-60af-87d7-ed4b3d567f63

Article author

@BillWagner

Metadata

• ID: 502309a5-a298-3ecc-2ff8-99faf674b5aa
• PlatformId: 368d0e44-741e-60af-87d7-ed4b3d567f63
• Service: dotnet-visualbasic

Related Issues</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes DBNull represents a missing bvalue, not a "nonexistent database column" #51948

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

---

Internal previews

📄 File	🔗 Preview link
docs/visual-basic/language-reference/nothing.md	docs/visual-basic/language-reference/nothing

[BillWagner]

This LGTM. I'll

[Copilot]

Pull request overview

This PR corrects a factual inaccuracy in the Visual Basic Nothing keyword reference documentation. The original text incorrectly stated that DBNull represents "a nonexistent database column," when DBNull actually represents a missing (null) value within an existing database column.

Changes:

• Corrects the DBNull description from "a nonexistent database column" to "a missing value in a database column" in the Visual Basic Nothing keyword reference.