Use correct xref format for TestDataRow

[Copilot]

The ## TestDataRow section was using backtick formatting for TestDataRow<T> instead of <xref:...> links, unlike every other type introduced in the same article.

The correct xref for a generic type with one type parameter uses %60 (URL-encoded backtick) + arity. This PR updates the section to use proper xref links throughout.

Changes Made

• Class link: Changed `TestDataRow<T>` to <xref:Microsoft.VisualStudio.TestTools.UnitTesting.TestDataRow%601> in the section introduction
• DisplayName property: Added <xref:Microsoft.VisualStudio.TestTools.UnitTesting.TestDataRow%601.DisplayName> to the "Custom display names" bullet point
• TestCategories property: Added <xref:Microsoft.VisualStudio.TestTools.UnitTesting.TestDataRow%601.TestCategories> to the "Test categories" bullet point

These changes match the pattern already used elsewhere in the docs for generic types (e.g., IEnumerable%601, IOptions%601).

Original prompt

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This section details on the original issue you should resolve

<issue_title>Use correct cross-reference links for TestDataRow</issue_title>
<issue_description>### Type of issue

Other (describe below)

Description

Follow-up from: #50979

The following cross-reference (xref) links couldn't be found:

• xref:Microsoft.VisualStudio.TestTools.UnitTesting.TestDataRow-1
• xref:Microsoft.VisualStudio.TestTools.UnitTesting.TestDataRow-1.DisplayName
• xref:Microsoft.VisualStudio.TestTools.UnitTesting.TestDataRow-1.TestCategories

Page URL

https://learn.microsoft.com/en-us/dotnet/core/testing/unit-testing-mstest-writing-tests-attributes

Content source URL

https://github.com/dotnet/docs/blob/main/docs/core/testing/unit-testing-mstest-writing-tests-attributes.md

Document Version Independent Id

45a09de0-80af-30d5-6f7d-67d7e9c90faa

Platform Id

af14a374-3e95-9888-c94b-e82c9e6909fe

Article author

@Evangelink

Metadata

• ID: 226a7811-aebe-4053-dd68-e222b328bd7c
• PlatformId: af14a374-3e95-9888-c94b-e82c9e6909fe
• Service: dotnet-fundamentals

Related Issues</issue_description>

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

• Fixes Use correct cross-reference links for TestDataRow #51178

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Internal previews

📄 File	🔗 Preview link
docs/core/testing/unit-testing-mstest-writing-tests-data-driven.md	Data-driven testing in MSTest

[Copilot]

Pull request overview

Updates the MSTest data-driven testing article to use correct xref syntax for the generic TestDataRow<T> type and its members, aligning the section with the rest of the doc’s xref-based API references.

Changes:

• Replaces the TestDataRow<T> inline code formatting in the section intro with a proper <xref:...> to the generic type.
• Adds xref links for TestDataRow<T> member properties (DisplayName, TestCategories, and IgnoreMessage) in the feature bullets.
• Updates ms.date to reflect the edit date.

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