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[BuildCheck Suggestion]: Batching Copy task invocations

Area: BuildCheck

BuildCheck SuggestionSuggestion for a built in MSBuild analyzer. Label should be applied together with 'Area: BuildCheck'Suggestion for a built in MSBuild analyzer. Label should be applied together with 'Area: BuildCheck'

Status: Open.

Feature

#12884 In dotnet/msbuild;

· rainersigwald opened on Dec 5, 2025

Target up-to-date checks should support content-based checks, not just timestamp-based

Area: EngineIssues impacting the core execution of targets and tasks.Issues impacting the core execution of targets and tasks.

Area: Incremental BuildIssues that affect incremental build scenarioIssues that affect incremental build scenario

Status: Open.

Feature

#12883 In dotnet/msbuild;

· baronfel opened on Dec 5, 2025

[Performance]: Task Telemetry

Status: Open.

Bug

#12882 In dotnet/msbuild;

· SimaTian opened on Dec 5, 2025

WPF template project does not build with -mt

Area: TasksIssues impacting the tasks shipped in Microsoft.Build.Tasks.Core.dll.Issues impacting the tasks shipped in Microsoft.Build.Tasks.Core.dll.

Status: Open.

#12881 In dotnet/msbuild;

· JanProvaznik opened on Dec 5, 2025

When chaining item functions and comparing the result to empty string, the comparison will return false incorrectly.

Status: Open.

Bug

#12877 In dotnet/msbuild;

· ericstj opened on Dec 5, 2025

[dnceng-bot] Branch <code>msbuild/exp/raines/publish-via-template-where-possible</code> can't be mirrored to Azdo fast forward branch

Status: Open.

#12870 In dotnet/msbuild;

· dotnet-maestro-bot opened on Dec 3, 2025

-mt Concurrency issue

Status: Open.

Bug

#12867 In dotnet/msbuild;

· SimaTian opened on Dec 3, 2025

-mt measurements for Roslyn

triaged

Status: Open.

#12866 In dotnet/msbuild;

· SimaTian opened on Dec 3, 2025

TaskHost Does Not Support Critical IBuildEngine Callbacks

Area: TasksIssues impacting the tasks shipped in Microsoft.Build.Tasks.Core.dll.Issues impacting the tasks shipped in Microsoft.Build.Tasks.Core.dll.

Status: Open.

Bug

#12863 In dotnet/msbuild;

· SimaTian opened on Dec 3, 2025

Add a test that uses TaskHostFactory in .NET SDK

Status: Open.

Task

#12859 In dotnet/msbuild;

· rainersigwald opened on Dec 2, 2025

Environment variable keys should be case sensitive on unix

Status: Open.

#12858 In dotnet/msbuild;

· JanProvaznik opened on Dec 2, 2025

<code>Exec</code> Task should allow for specifying arguments as an array instead of the full string

Area: TasksIssues impacting the tasks shipped in Microsoft.Build.Tasks.Core.dll.Issues impacting the tasks shipped in Microsoft.Build.Tasks.Core.dll.

User Experience

Status: Open.

Feature

#12855 In dotnet/msbuild;

· baronfel opened on Dec 2, 2025