[Flaky Test] Microsoft.Build.UnitTests.CodeTaskFactoryTests.BuildTaskDateCodeFactory

**Flaky-test key** (automated de-duplication — do not edit):
```text
flaky-test-id: Microsoft.Build.UnitTests.CodeTaskFactoryTests.BuildTaskDateCodeFactory
```

## Evidence

- **Distinct sources:** 4 (0 PRs, 4 rolling builds on `main`)
- **Rolling build IDs:** [1514373](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1514373), [1517682](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1517682), [1527742](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1527742), [1532844](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1532844)
- **Legs:** FullOnWindows Release
- **Assembly:** `Microsoft.Build.Tasks.UnitTests`
- **First seen:** 2026-07-17 | **Last seen:** 2026-07-30
- **Error hash:** 2f59b830
- **Sample error:** `Assert.True() Failure — Expected: True, Actual: False`

## Action

This test will be quarantined via `[ActiveIssue("")]` (from `Microsoft.DotNet.XUnitV3Extensions`, namespace `Xunit`) until the underlying nondeterminism is fixed. The quarantine pipeline (def 344) will continue gathering pass/fail signal.

**Assembly:** `Microsoft.Build.Tasks.UnitTests`
**Class:** `Microsoft.Build.UnitTests.CodeTaskFactoryTests`
**Method:** `BuildTaskDateCodeFactory`
**Source:** `src/Tasks.UnitTests/CodeTaskFactoryTests.cs`

> [!WARNING]
>
> Firewall blocked 2 domains
>
> The following domains were blocked by the firewall during workflow execution:
>
> - `awmgmcpg`
> - `southcentralus0.in.applicationinsights.azure.com`
>> To allow these domains, add them to the `network.allowed` list in your workflow frontmatter:
>
> ```yaml
> network:
> allowed:
> - defaults
> - "awmgmcpg"
> - "southcentralus0.in.applicationinsights.azure.com"
> ```
>
> See [Network Configuration](https://github.github.com/gh-aw/reference/network/) for more information.
>
>

> Generated by [Flaky Test Triage](https://github.com/dotnet/msbuild/actions/runs/30541891245) · sonnet46 · 155.1 AIC · ⌖ 5.48 AIC · ⊞ 14.7K · [◷](https://github.com/search?q=repo%3Adotnet%2Fmsbuild+is%3Aissue+%22gh-aw-workflow-call-id%3A+dotnet%2Fmsbuild%2Fflaky-test-detector.agent%22&type=issues)

Start with src/Tasks.UnitTests/CodeTaskFactoryTests.cs and the BuildTaskDateCodeFactory method, then run the focused Microsoft.Build.Tasks.UnitTests test repeatedly on Windows Release. Compare the failure evidence from rolling builds 1514373, 1517682, 1527742, and 1532844. Done means the test is stable and no longer requires quarantine.

Written by the indexing model from the issue text.