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[DO NOT REVIEW] Set DOTNET_HOST_PATH and enable comm tracing in test environment#53511

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YuliiaKovalova wants to merge 15 commits intomainfrom
fix/apphost-taskhost-dotnet-host-path-v2
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[DO NOT REVIEW] Set DOTNET_HOST_PATH and enable comm tracing in test environment#53511
YuliiaKovalova wants to merge 15 commits intomainfrom
fix/apphost-taskhost-dotnet-host-path-v2

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@YuliiaKovalova YuliiaKovalova commented Mar 18, 2026

MSBuild's apphost support (dotnet/msbuild#13175) requires DOTNET_HOST_PATH to resolve DOTNET_ROOT when launching out-of-proc task hosts for TaskHostFactory tasks (e.g. ComputeWasmBuildAssets, ComputeManagedAssemblies).

The MSBuild apphost is now created in the SDK layout (dotnet/dotnet#5183), so ResolveAppHostOrFallback takes the apphost code path. It calls CreateDotnetRootEnvironmentOverrides which derives DOTNET_ROOT from DOTNET_HOST_PATH. While the dotnet CLI sets this internally, explicitly providing it in the test environment ensures it is available for the task host subprocess launch.

Also enable MSBUILDDEBUGCOMM tracing to capture handshake details for diagnosing any remaining task host connection issues.

dotnet-maestro Bot and others added 14 commits March 10, 2026 02:11
@dotnet-maestro
Backflow from https://github.com/dotnet/dotnet / 5121846 build 305296
de65c50 
[[ commit created by automation ]]
@dotnet-maestro
Update dependencies from build 305296
ff6e1fe 
Updated Dependencies:
dotnet-dev-certs, dotnet-user-jwts, dotnet-user-secrets, Microsoft.AspNetCore.Analyzers, Microsoft.AspNetCore.App.Ref, Microsoft.AspNetCore.App.Ref.Internal, Microsoft.AspNetCore.Authentication.Facebook, Microsoft.AspNetCore.Authentication.Google, Microsoft.AspNetCore.Authentication.MicrosoftAccount, Microsoft.AspNetCore.Authorization, Microsoft.AspNetCore.Components, Microsoft.AspNetCore.Components.Analyzers, Microsoft.AspNetCore.Components.Forms, Microsoft.AspNetCore.Components.SdkAnalyzers, Microsoft.AspNetCore.Components.Web, Microsoft.AspNetCore.Components.WebAssembly, Microsoft.AspNetCore.Components.WebAssembly.Server, Microsoft.AspNetCore.Components.WebView, Microsoft.AspNetCore.DeveloperCertificates.XPlat, Microsoft.AspNetCore.Metadata, Microsoft.AspNetCore.Mvc.Analyzers, Microsoft.AspNetCore.Mvc.Api.Analyzers, Microsoft.AspNetCore.TestHost, Microsoft.Bcl.AsyncInterfaces, Microsoft.DotNet.Web.ItemTemplates.11.0, Microsoft.DotNet.Web.ProjectTemplates.11.0, Microsoft.Dotnet.WinForms.ProjectTemplates, Microsoft.DotNet.Wpf.ProjectTemplates, Microsoft.Extensions.Configuration.Ini, Microsoft.Extensions.DependencyModel, Microsoft.Extensions.FileProviders.Abstractions, Microsoft.Extensions.FileProviders.Embedded, Microsoft.Extensions.FileSystemGlobbing, Microsoft.Extensions.Logging, Microsoft.Extensions.Logging.Abstractions, Microsoft.Extensions.Logging.Console, Microsoft.Extensions.ObjectPool, Microsoft.JSInterop, Microsoft.NET.HostModel, Microsoft.NET.ILLink.Tasks, Microsoft.NET.Runtime.Emscripten.3.1.56.Cache.win-x64, Microsoft.NET.Sdk.WindowsDesktop, Microsoft.NETCore.App.Ref, Microsoft.NETCore.Platforms, Microsoft.Win32.SystemEvents, Microsoft.WindowsDesktop.App.Internal, Microsoft.WindowsDesktop.App.Ref, System.CodeDom, System.ComponentModel.Composition, System.Composition.AttributedModel, System.Composition.Convention, System.Composition.Hosting, System.Composition.Runtime, System.Composition.TypedParts, System.Configuration.ConfigurationManager, System.Diagnostics.DiagnosticSource, System.Formats.Asn1, System.IO.Hashing, System.Reflection.MetadataLoadContext, System.Resources.Extensions, System.Security.Cryptography.Pkcs, System.Security.Cryptography.ProtectedData, System.Security.Cryptography.Xml, System.Security.Permissions, System.ServiceProcess.ServiceController, System.Text.Encoding.CodePages, System.Text.Json, System.Windows.Extensions (Version 11.0.0-preview.3.26153.117 -> 11.0.0-preview.3.26159.106)
Microsoft.AspNetCore.Mvc.Razor.Extensions.Tooling.Internal, Microsoft.CodeAnalysis.Razor.Tooling.Internal, Microsoft.NET.Sdk.Razor.SourceGenerators.Transport (Version 10.0.0-preview.26153.117 -> 10.0.0-preview.26159.106)
Microsoft.Build, Microsoft.Build.Localization (Version 18.6.0-preview-26153-117 -> 18.6.0-preview-26159-106)
Microsoft.Build.NuGetSdkResolver, NuGet.Build.Tasks, NuGet.Build.Tasks.Console, NuGet.Build.Tasks.Pack, NuGet.CommandLine.XPlat, NuGet.Commands, NuGet.Common, NuGet.Configuration, NuGet.Credentials, NuGet.DependencyResolver.Core, NuGet.Frameworks, NuGet.LibraryModel, NuGet.Localization, NuGet.Packaging, NuGet.ProjectModel, NuGet.Protocol, NuGet.Versioning (Version 7.5.0-rc.15417 -> 7.5.0-rc.16006)
Microsoft.Build.Tasks.Git, Microsoft.SourceLink.AzureRepos.Git, Microsoft.SourceLink.Bitbucket.Git, Microsoft.SourceLink.Common, Microsoft.SourceLink.GitHub, Microsoft.SourceLink.GitLab, Microsoft.TemplateEngine.Abstractions, Microsoft.TemplateEngine.Authoring.TemplateVerifier, Microsoft.TemplateEngine.Edge, Microsoft.TemplateEngine.Mocks, Microsoft.TemplateEngine.Orchestrator.RunnableProjects, Microsoft.TemplateEngine.TestHelper, Microsoft.TemplateEngine.Utils, Microsoft.TemplateSearch.Common, Microsoft.TemplateSearch.TemplateDiscovery (Version 11.0.100-preview.3.26153.117 -> 11.0.100-preview.3.26159.106)
Microsoft.CodeAnalysis, Microsoft.CodeAnalysis.BuildClient, Microsoft.CodeAnalysis.CSharp, Microsoft.CodeAnalysis.CSharp.CodeStyle, Microsoft.CodeAnalysis.CSharp.Features, Microsoft.CodeAnalysis.CSharp.Workspaces, Microsoft.CodeAnalysis.ExternalAccess.HotReload, Microsoft.CodeAnalysis.PublicApiAnalyzers, Microsoft.CodeAnalysis.Workspaces.Common, Microsoft.CodeAnalysis.Workspaces.MSBuild, Microsoft.Net.Compilers.Toolset, Microsoft.Net.Compilers.Toolset.Framework (Version 5.6.0-2.26153.117 -> 5.6.0-2.26159.106)
Microsoft.Deployment.DotNet.Releases (Version 2.0.0-preview.1.26153.117 -> 2.0.0-preview.1.26159.106)
Microsoft.DiaSymReader, System.CommandLine (Version 3.0.0-preview.3.26153.117 -> 3.0.0-preview.3.26159.106)
Microsoft.DotNet.Arcade.Sdk, Microsoft.DotNet.Build.Tasks.Installers, Microsoft.DotNet.Build.Tasks.Templating, Microsoft.DotNet.Build.Tasks.Workloads, Microsoft.DotNet.Helix.Sdk, Microsoft.DotNet.SignTool, Microsoft.DotNet.XliffTasks, Microsoft.DotNet.XUnitExtensions (Version 11.0.0-beta.26153.117 -> 11.0.0-beta.26159.106)
Microsoft.FSharp.Compiler (Version 15.2.100-preview3.26153.117 -> 15.2.100-preview3.26159.106)
Microsoft.NET.Test.Sdk, Microsoft.TestPlatform.Build, Microsoft.TestPlatform.CLI (Version 18.5.0-preview-26153-117 -> 18.5.0-preview-26159-106)
Microsoft.Web.Xdt (Version 3.3.0-preview.3.26153.117 -> 3.3.0-preview.3.26159.106)

Added Dependencies:
Microsoft.Extensions.DependencyInjection.Abstractions (Version 11.0.0-preview.3.26159.106)
[[ commit created by automation ]]
@DonnaChen888
Merge branch 'main' of https://github.com/dotnet/sdk into darc-main-4…
57f181d 
…2f55340-3bb4-4b0f-9661-026bcf6564d1
@dotnet-maestro
Backflow from https://github.com/dotnet/dotnet / 542fea6 build 305563
8a76502 
[[ commit created by automation ]]
@dotnet-maestro
Update dependencies from build 305563
2cf5d9f 
Updated Dependencies:
dotnet-dev-certs, dotnet-user-jwts, dotnet-user-secrets, Microsoft.AspNetCore.Analyzers, Microsoft.AspNetCore.App.Ref, Microsoft.AspNetCore.App.Ref.Internal, Microsoft.AspNetCore.Authentication.Facebook, Microsoft.AspNetCore.Authentication.Google, Microsoft.AspNetCore.Authentication.MicrosoftAccount, Microsoft.AspNetCore.Authorization, Microsoft.AspNetCore.Components, Microsoft.AspNetCore.Components.Analyzers, Microsoft.AspNetCore.Components.Forms, Microsoft.AspNetCore.Components.SdkAnalyzers, Microsoft.AspNetCore.Components.Web, Microsoft.AspNetCore.Components.WebAssembly, Microsoft.AspNetCore.Components.WebAssembly.Server, Microsoft.AspNetCore.Components.WebView, Microsoft.AspNetCore.DeveloperCertificates.XPlat, Microsoft.AspNetCore.Metadata, Microsoft.AspNetCore.Mvc.Analyzers, Microsoft.AspNetCore.Mvc.Api.Analyzers, Microsoft.AspNetCore.TestHost, Microsoft.Bcl.AsyncInterfaces, Microsoft.DotNet.Web.ItemTemplates.11.0, Microsoft.DotNet.Web.ProjectTemplates.11.0, Microsoft.Dotnet.WinForms.ProjectTemplates, Microsoft.DotNet.Wpf.ProjectTemplates, Microsoft.Extensions.Configuration.Ini, Microsoft.Extensions.DependencyInjection.Abstractions, Microsoft.Extensions.DependencyModel, Microsoft.Extensions.FileProviders.Abstractions, Microsoft.Extensions.FileProviders.Embedded, Microsoft.Extensions.FileSystemGlobbing, Microsoft.Extensions.Logging, Microsoft.Extensions.Logging.Abstractions, Microsoft.Extensions.Logging.Console, Microsoft.Extensions.ObjectPool, Microsoft.JSInterop, Microsoft.NET.HostModel, Microsoft.NET.ILLink.Tasks, Microsoft.NET.Runtime.Emscripten.3.1.56.Cache.win-x64, Microsoft.NET.Sdk.WindowsDesktop, Microsoft.NETCore.App.Ref, Microsoft.NETCore.Platforms, Microsoft.Win32.SystemEvents, Microsoft.WindowsDesktop.App.Internal, Microsoft.WindowsDesktop.App.Ref, System.CodeDom, System.ComponentModel.Composition, System.Composition.AttributedModel, System.Composition.Convention, System.Composition.Hosting, System.Composition.Runtime, System.Composition.TypedParts, System.Configuration.ConfigurationManager, System.Diagnostics.DiagnosticSource, System.Formats.Asn1, System.IO.Hashing, System.Reflection.MetadataLoadContext, System.Resources.Extensions, System.Security.Cryptography.Pkcs, System.Security.Cryptography.ProtectedData, System.Security.Cryptography.Xml, System.Security.Permissions, System.ServiceProcess.ServiceController, System.Text.Encoding.CodePages, System.Text.Json, System.Windows.Extensions (Version 11.0.0-preview.3.26159.106 -> 11.0.0-preview.3.26160.112)
Microsoft.AspNetCore.Mvc.Razor.Extensions.Tooling.Internal, Microsoft.CodeAnalysis.Razor.Tooling.Internal, Microsoft.NET.Sdk.Razor.SourceGenerators.Transport (Version 10.0.0-preview.26159.106 -> 10.0.0-preview.26160.112)
Microsoft.Build, Microsoft.Build.Localization (Version 18.6.0-preview-26159-106 -> 18.6.0-preview-26160-112)
Microsoft.Build.NuGetSdkResolver, NuGet.Build.Tasks, NuGet.Build.Tasks.Console, NuGet.Build.Tasks.Pack, NuGet.CommandLine.XPlat, NuGet.Commands, NuGet.Common, NuGet.Configuration, NuGet.Credentials, NuGet.DependencyResolver.Core, NuGet.Frameworks, NuGet.LibraryModel, NuGet.Localization, NuGet.Packaging, NuGet.ProjectModel, NuGet.Protocol, NuGet.Versioning (Version 7.5.0-rc.16006 -> 7.5.0-rc.16112)
Microsoft.Build.Tasks.Git, Microsoft.SourceLink.AzureRepos.Git, Microsoft.SourceLink.Bitbucket.Git, Microsoft.SourceLink.Common, Microsoft.SourceLink.GitHub, Microsoft.SourceLink.GitLab, Microsoft.TemplateEngine.Abstractions, Microsoft.TemplateEngine.Authoring.TemplateVerifier, Microsoft.TemplateEngine.Edge, Microsoft.TemplateEngine.Mocks, Microsoft.TemplateEngine.Orchestrator.RunnableProjects, Microsoft.TemplateEngine.TestHelper, Microsoft.TemplateEngine.Utils, Microsoft.TemplateSearch.Common, Microsoft.TemplateSearch.TemplateDiscovery (Version 11.0.100-preview.3.26159.106 -> 11.0.100-preview.3.26160.112)
Microsoft.CodeAnalysis, Microsoft.CodeAnalysis.BuildClient, Microsoft.CodeAnalysis.CSharp, Microsoft.CodeAnalysis.CSharp.CodeStyle, Microsoft.CodeAnalysis.CSharp.Features, Microsoft.CodeAnalysis.CSharp.Workspaces, Microsoft.CodeAnalysis.ExternalAccess.HotReload, Microsoft.CodeAnalysis.PublicApiAnalyzers, Microsoft.CodeAnalysis.Workspaces.Common, Microsoft.CodeAnalysis.Workspaces.MSBuild, Microsoft.Net.Compilers.Toolset, Microsoft.Net.Compilers.Toolset.Framework (Version 5.6.0-2.26159.106 -> 5.6.0-2.26160.112)
Microsoft.Deployment.DotNet.Releases (Version 2.0.0-preview.1.26159.106 -> 2.0.0-preview.1.26160.112)
Microsoft.DiaSymReader, System.CommandLine (Version 3.0.0-preview.3.26159.106 -> 3.0.0-preview.3.26160.112)
Microsoft.DotNet.Arcade.Sdk, Microsoft.DotNet.Build.Tasks.Installers, Microsoft.DotNet.Build.Tasks.Templating, Microsoft.DotNet.Build.Tasks.Workloads, Microsoft.DotNet.Helix.Sdk, Microsoft.DotNet.SignTool, Microsoft.DotNet.XliffTasks, Microsoft.DotNet.XUnitExtensions (Version 11.0.0-beta.26159.106 -> 11.0.0-beta.26160.112)
Microsoft.FSharp.Compiler (Version 15.2.100-preview3.26159.106 -> 15.2.100-preview3.26160.112)
Microsoft.NET.Test.Sdk, Microsoft.TestPlatform.Build, Microsoft.TestPlatform.CLI (Version 18.5.0-preview-26159-106 -> 18.5.0-preview-26160-112)
Microsoft.Web.Xdt (Version 3.3.0-preview.3.26159.106 -> 3.3.0-preview.3.26160.112)
[[ commit created by automation ]]
@DonnaChen888
Update baselines
2fbadcb
@dotnet-maestro
Backflow from https://github.com/dotnet/dotnet / e405b1f build 305814
9b04fe2 
[[ commit created by automation ]]
@dotnet-maestro
Merge main into darc-main-42f55340-3bb4-4b0f-9661-026bcf6564d1
29ed31a
@dotnet-maestro
Update dependencies from build 305814
50885f1 
Updated Dependencies:
dotnet-dev-certs, dotnet-user-jwts, dotnet-user-secrets, Microsoft.AspNetCore.Analyzers, Microsoft.AspNetCore.App.Ref, Microsoft.AspNetCore.App.Ref.Internal, Microsoft.AspNetCore.Authentication.Facebook, Microsoft.AspNetCore.Authentication.Google, Microsoft.AspNetCore.Authentication.MicrosoftAccount, Microsoft.AspNetCore.Authorization, Microsoft.AspNetCore.Components, Microsoft.AspNetCore.Components.Analyzers, Microsoft.AspNetCore.Components.Forms, Microsoft.AspNetCore.Components.SdkAnalyzers, Microsoft.AspNetCore.Components.Web, Microsoft.AspNetCore.Components.WebAssembly, Microsoft.AspNetCore.Components.WebAssembly.Server, Microsoft.AspNetCore.Components.WebView, Microsoft.AspNetCore.DeveloperCertificates.XPlat, Microsoft.AspNetCore.Metadata, Microsoft.AspNetCore.Mvc.Analyzers, Microsoft.AspNetCore.Mvc.Api.Analyzers, Microsoft.AspNetCore.TestHost, Microsoft.Bcl.AsyncInterfaces, Microsoft.DotNet.Web.ItemTemplates.11.0, Microsoft.DotNet.Web.ProjectTemplates.11.0, Microsoft.Dotnet.WinForms.ProjectTemplates, Microsoft.DotNet.Wpf.ProjectTemplates, Microsoft.Extensions.Configuration.Ini, Microsoft.Extensions.DependencyInjection.Abstractions, Microsoft.Extensions.DependencyModel, Microsoft.Extensions.FileProviders.Abstractions, Microsoft.Extensions.FileProviders.Embedded, Microsoft.Extensions.FileSystemGlobbing, Microsoft.Extensions.Logging, Microsoft.Extensions.Logging.Abstractions, Microsoft.Extensions.Logging.Console, Microsoft.Extensions.ObjectPool, Microsoft.JSInterop, Microsoft.NET.HostModel, Microsoft.NET.ILLink.Tasks, Microsoft.NET.Runtime.Emscripten.3.1.56.Cache.win-x64, Microsoft.NET.Sdk.WindowsDesktop, Microsoft.NETCore.App.Ref, Microsoft.NETCore.Platforms, Microsoft.Win32.SystemEvents, Microsoft.WindowsDesktop.App.Internal, Microsoft.WindowsDesktop.App.Ref, System.CodeDom, System.ComponentModel.Composition, System.Composition.AttributedModel, System.Composition.Convention, System.Composition.Hosting, System.Composition.Runtime, System.Composition.TypedParts, System.Configuration.ConfigurationManager, System.Diagnostics.DiagnosticSource, System.Formats.Asn1, System.IO.Hashing, System.Reflection.MetadataLoadContext, System.Resources.Extensions, System.Security.Cryptography.Pkcs, System.Security.Cryptography.ProtectedData, System.Security.Cryptography.Xml, System.Security.Permissions, System.ServiceProcess.ServiceController, System.Text.Encoding.CodePages, System.Text.Json, System.Windows.Extensions (Version 11.0.0-preview.3.26160.112 -> 11.0.0-preview.3.26161.108)
Microsoft.AspNetCore.Mvc.Razor.Extensions.Tooling.Internal, Microsoft.CodeAnalysis.Razor.Tooling.Internal, Microsoft.NET.Sdk.Razor.SourceGenerators.Transport (Version 10.0.0-preview.26160.112 -> 10.0.0-preview.26161.108)
Microsoft.Build, Microsoft.Build.Localization (Version 18.6.0-preview-26160-112 -> 18.6.0-preview-26161-108)
Microsoft.Build.NuGetSdkResolver, NuGet.Build.Tasks, NuGet.Build.Tasks.Console, NuGet.Build.Tasks.Pack, NuGet.CommandLine.XPlat, NuGet.Commands, NuGet.Common, NuGet.Configuration, NuGet.Credentials, NuGet.DependencyResolver.Core, NuGet.Frameworks, NuGet.LibraryModel, NuGet.Localization, NuGet.Packaging, NuGet.ProjectModel, NuGet.Protocol, NuGet.Versioning (Version 7.5.0-rc.16112 -> 7.5.0-rc.16208)
Microsoft.Build.Tasks.Git, Microsoft.SourceLink.AzureRepos.Git, Microsoft.SourceLink.Bitbucket.Git, Microsoft.SourceLink.Common, Microsoft.SourceLink.GitHub, Microsoft.SourceLink.GitLab, Microsoft.TemplateEngine.Abstractions, Microsoft.TemplateEngine.Authoring.TemplateVerifier, Microsoft.TemplateEngine.Edge, Microsoft.TemplateEngine.Mocks, Microsoft.TemplateEngine.Orchestrator.RunnableProjects, Microsoft.TemplateEngine.TestHelper, Microsoft.TemplateEngine.Utils, Microsoft.TemplateSearch.Common, Microsoft.TemplateSearch.TemplateDiscovery (Version 11.0.100-preview.3.26160.112 -> 11.0.100-preview.3.26161.108)
Microsoft.CodeAnalysis, Microsoft.CodeAnalysis.BuildClient, Microsoft.CodeAnalysis.CSharp, Microsoft.CodeAnalysis.CSharp.CodeStyle, Microsoft.CodeAnalysis.CSharp.Features, Microsoft.CodeAnalysis.CSharp.Workspaces, Microsoft.CodeAnalysis.ExternalAccess.HotReload, Microsoft.CodeAnalysis.PublicApiAnalyzers, Microsoft.CodeAnalysis.Workspaces.Common, Microsoft.CodeAnalysis.Workspaces.MSBuild, Microsoft.Net.Compilers.Toolset, Microsoft.Net.Compilers.Toolset.Framework (Version 5.6.0-2.26160.112 -> 5.6.0-2.26161.108)
Microsoft.Deployment.DotNet.Releases (Version 2.0.0-preview.1.26160.112 -> 2.0.0-preview.1.26161.108)
Microsoft.DiaSymReader, System.CommandLine (Version 3.0.0-preview.3.26160.112 -> 3.0.0-preview.3.26161.108)
Microsoft.DotNet.Arcade.Sdk, Microsoft.DotNet.Build.Tasks.Installers, Microsoft.DotNet.Build.Tasks.Templating, Microsoft.DotNet.Build.Tasks.Workloads, Microsoft.DotNet.Helix.Sdk, Microsoft.DotNet.SignTool, Microsoft.DotNet.XliffTasks, Microsoft.DotNet.XUnitExtensions (Version 11.0.0-beta.26160.112 -> 11.0.0-beta.26161.108)
Microsoft.FSharp.Compiler (Version 15.2.100-preview3.26160.112 -> 15.2.100-preview3.26161.108)
Microsoft.NET.Test.Sdk, Microsoft.TestPlatform.Build, Microsoft.TestPlatform.CLI (Version 18.5.0-preview-26160-112 -> 18.5.0-preview-26161-108)
Microsoft.Web.Xdt (Version 3.3.0-preview.3.26160.112 -> 3.3.0-preview.3.26161.108)
[[ commit created by automation ]]
@dotnet-maestro
Update dependencies from build 305927
dcf7f00 
Updated Dependencies:
dotnet-dev-certs, dotnet-user-jwts, dotnet-user-secrets, Microsoft.AspNetCore.Analyzers, Microsoft.AspNetCore.App.Ref, Microsoft.AspNetCore.App.Ref.Internal, Microsoft.AspNetCore.Authentication.Facebook, Microsoft.AspNetCore.Authentication.Google, Microsoft.AspNetCore.Authentication.MicrosoftAccount, Microsoft.AspNetCore.Authorization, Microsoft.AspNetCore.Components, Microsoft.AspNetCore.Components.Analyzers, Microsoft.AspNetCore.Components.Forms, Microsoft.AspNetCore.Components.SdkAnalyzers, Microsoft.AspNetCore.Components.Web, Microsoft.AspNetCore.Components.WebAssembly, Microsoft.AspNetCore.Components.WebAssembly.Server, Microsoft.AspNetCore.Components.WebView, Microsoft.AspNetCore.DeveloperCertificates.XPlat, Microsoft.AspNetCore.Metadata, Microsoft.AspNetCore.Mvc.Analyzers, Microsoft.AspNetCore.Mvc.Api.Analyzers, Microsoft.AspNetCore.TestHost, Microsoft.Bcl.AsyncInterfaces, Microsoft.DotNet.Web.ItemTemplates.11.0, Microsoft.DotNet.Web.ProjectTemplates.11.0, Microsoft.Dotnet.WinForms.ProjectTemplates, Microsoft.DotNet.Wpf.ProjectTemplates, Microsoft.Extensions.Configuration.Ini, Microsoft.Extensions.DependencyInjection.Abstractions, Microsoft.Extensions.DependencyModel, Microsoft.Extensions.FileProviders.Abstractions, Microsoft.Extensions.FileProviders.Embedded, Microsoft.Extensions.FileSystemGlobbing, Microsoft.Extensions.Logging, Microsoft.Extensions.Logging.Abstractions, Microsoft.Extensions.Logging.Console, Microsoft.Extensions.ObjectPool, Microsoft.JSInterop, Microsoft.NET.HostModel, Microsoft.NET.ILLink.Tasks, Microsoft.NET.Runtime.Emscripten.3.1.56.Cache.win-x64, Microsoft.NET.Sdk.WindowsDesktop, Microsoft.NETCore.App.Ref, Microsoft.NETCore.Platforms, Microsoft.Win32.SystemEvents, Microsoft.WindowsDesktop.App.Internal, Microsoft.WindowsDesktop.App.Ref, System.CodeDom, System.ComponentModel.Composition, System.Composition.AttributedModel, System.Composition.Convention, System.Composition.Hosting, System.Composition.Runtime, System.Composition.TypedParts, System.Configuration.ConfigurationManager, System.Diagnostics.DiagnosticSource, System.Formats.Asn1, System.IO.Hashing, System.Reflection.MetadataLoadContext, System.Resources.Extensions, System.Security.Cryptography.Pkcs, System.Security.Cryptography.ProtectedData, System.Security.Cryptography.Xml, System.Security.Permissions, System.ServiceProcess.ServiceController, System.Text.Encoding.CodePages, System.Text.Json, System.Windows.Extensions (Version 11.0.0-preview.3.26161.108 -> 11.0.0-preview.3.26162.108)
Microsoft.AspNetCore.Mvc.Razor.Extensions.Tooling.Internal, Microsoft.CodeAnalysis.Razor.Tooling.Internal, Microsoft.NET.Sdk.Razor.SourceGenerators.Transport (Version 10.0.0-preview.26161.108 -> 10.0.0-preview.26162.108)
Microsoft.Build, Microsoft.Build.Localization (Version 18.6.0-preview-26161-108 -> 18.6.0-preview-26162-108)
Microsoft.Build.NuGetSdkResolver, NuGet.Build.Tasks, NuGet.Build.Tasks.Console, NuGet.Build.Tasks.Pack, NuGet.CommandLine.XPlat, NuGet.Commands, NuGet.Common, NuGet.Configuration, NuGet.Credentials, NuGet.DependencyResolver.Core, NuGet.Frameworks, NuGet.LibraryModel, NuGet.Localization, NuGet.Packaging, NuGet.ProjectModel, NuGet.Protocol, NuGet.Versioning (Version 7.5.0-rc.16208 -> 7.5.0-rc.16308)
Microsoft.Build.Tasks.Git, Microsoft.SourceLink.AzureRepos.Git, Microsoft.SourceLink.Bitbucket.Git, Microsoft.SourceLink.Common, Microsoft.SourceLink.GitHub, Microsoft.SourceLink.GitLab, Microsoft.TemplateEngine.Abstractions, Microsoft.TemplateEngine.Authoring.TemplateVerifier, Microsoft.TemplateEngine.Edge, Microsoft.TemplateEngine.Mocks, Microsoft.TemplateEngine.Orchestrator.RunnableProjects, Microsoft.TemplateEngine.TestHelper, Microsoft.TemplateEngine.Utils, Microsoft.TemplateSearch.Common, Microsoft.TemplateSearch.TemplateDiscovery (Version 11.0.100-preview.3.26161.108 -> 11.0.100-preview.3.26162.108)
Microsoft.CodeAnalysis, Microsoft.CodeAnalysis.BuildClient, Microsoft.CodeAnalysis.CSharp, Microsoft.CodeAnalysis.CSharp.CodeStyle, Microsoft.CodeAnalysis.CSharp.Features, Microsoft.CodeAnalysis.CSharp.Workspaces, Microsoft.CodeAnalysis.ExternalAccess.HotReload, Microsoft.CodeAnalysis.PublicApiAnalyzers, Microsoft.CodeAnalysis.Workspaces.Common, Microsoft.CodeAnalysis.Workspaces.MSBuild, Microsoft.Net.Compilers.Toolset, Microsoft.Net.Compilers.Toolset.Framework (Version 5.6.0-2.26161.108 -> 5.6.0-2.26162.108)
Microsoft.Deployment.DotNet.Releases (Version 2.0.0-preview.1.26161.108 -> 2.0.0-preview.1.26162.108)
Microsoft.DiaSymReader, System.CommandLine (Version 3.0.0-preview.3.26161.108 -> 3.0.0-preview.3.26162.108)
Microsoft.DotNet.Arcade.Sdk, Microsoft.DotNet.Build.Tasks.Installers, Microsoft.DotNet.Build.Tasks.Templating, Microsoft.DotNet.Build.Tasks.Workloads, Microsoft.DotNet.Helix.Sdk, Microsoft.DotNet.SignTool, Microsoft.DotNet.XliffTasks, Microsoft.DotNet.XUnitExtensions (Version 11.0.0-beta.26161.108 -> 11.0.0-beta.26162.108)
Microsoft.FSharp.Compiler (Version 15.2.100-preview3.26161.108 -> 15.2.100-preview3.26162.108)
Microsoft.NET.Test.Sdk, Microsoft.TestPlatform.Build, Microsoft.TestPlatform.CLI (Version 18.5.0-preview-26161-108 -> 18.5.0-preview-26162-108)
Microsoft.Web.Xdt (Version 3.3.0-preview.3.26161.108 -> 3.3.0-preview.3.26162.108)
[[ commit created by automation ]]
@dotnet-maestro
Backflow from https://github.com/dotnet/dotnet / c059890 build 306027
982c8c7 
[[ commit created by automation ]]
@dotnet-maestro
Merge main into darc-main-42f55340-3bb4-4b0f-9661-026bcf6564d1
02d4ffe
@dotnet-maestro
Update dependencies from build 306027
162c1cd 
Updated Dependencies:
dotnet-dev-certs, dotnet-user-jwts, dotnet-user-secrets, Microsoft.AspNetCore.Analyzers, Microsoft.AspNetCore.App.Ref, Microsoft.AspNetCore.App.Ref.Internal, Microsoft.AspNetCore.Authentication.Facebook, Microsoft.AspNetCore.Authentication.Google, Microsoft.AspNetCore.Authentication.MicrosoftAccount, Microsoft.AspNetCore.Authorization, Microsoft.AspNetCore.Components, Microsoft.AspNetCore.Components.Analyzers, Microsoft.AspNetCore.Components.Forms, Microsoft.AspNetCore.Components.SdkAnalyzers, Microsoft.AspNetCore.Components.Web, Microsoft.AspNetCore.Components.WebAssembly, Microsoft.AspNetCore.Components.WebAssembly.Server, Microsoft.AspNetCore.Components.WebView, Microsoft.AspNetCore.DeveloperCertificates.XPlat, Microsoft.AspNetCore.Metadata, Microsoft.AspNetCore.Mvc.Analyzers, Microsoft.AspNetCore.Mvc.Api.Analyzers, Microsoft.AspNetCore.TestHost, Microsoft.Bcl.AsyncInterfaces, Microsoft.DotNet.Web.ItemTemplates.11.0, Microsoft.DotNet.Web.ProjectTemplates.11.0, Microsoft.Dotnet.WinForms.ProjectTemplates, Microsoft.DotNet.Wpf.ProjectTemplates, Microsoft.Extensions.Configuration.Ini, Microsoft.Extensions.DependencyInjection.Abstractions, Microsoft.Extensions.DependencyModel, Microsoft.Extensions.FileProviders.Abstractions, Microsoft.Extensions.FileProviders.Embedded, Microsoft.Extensions.FileSystemGlobbing, Microsoft.Extensions.Logging, Microsoft.Extensions.Logging.Abstractions, Microsoft.Extensions.Logging.Console, Microsoft.Extensions.ObjectPool, Microsoft.JSInterop, Microsoft.NET.HostModel, Microsoft.NET.ILLink.Tasks, Microsoft.NET.Runtime.Emscripten.3.1.56.Cache.win-x64, Microsoft.NET.Sdk.WindowsDesktop, Microsoft.NETCore.App.Ref, Microsoft.NETCore.Platforms, Microsoft.Win32.SystemEvents, Microsoft.WindowsDesktop.App.Internal, Microsoft.WindowsDesktop.App.Ref, System.CodeDom, System.ComponentModel.Composition, System.Composition.AttributedModel, System.Composition.Convention, System.Composition.Hosting, System.Composition.Runtime, System.Composition.TypedParts, System.Configuration.ConfigurationManager, System.Diagnostics.DiagnosticSource, System.Formats.Asn1, System.IO.Hashing, System.Reflection.MetadataLoadContext, System.Resources.Extensions, System.Security.Cryptography.Pkcs, System.Security.Cryptography.ProtectedData, System.Security.Cryptography.Xml, System.Security.Permissions, System.ServiceProcess.ServiceController, System.Text.Encoding.CodePages, System.Text.Json, System.Windows.Extensions (Version 11.0.0-preview.3.26162.108 -> 11.0.0-preview.3.26162.121)
Microsoft.AspNetCore.Mvc.Razor.Extensions.Tooling.Internal, Microsoft.CodeAnalysis.Razor.Tooling.Internal, Microsoft.NET.Sdk.Razor.SourceGenerators.Transport (Version 10.0.0-preview.26162.108 -> 10.0.0-preview.26162.121)
Microsoft.Build, Microsoft.Build.Localization (Version 18.6.0-preview-26162-108 -> 18.6.0-preview-26162-121)
Microsoft.Build.NuGetSdkResolver, NuGet.Build.Tasks, NuGet.Build.Tasks.Console, NuGet.Build.Tasks.Pack, NuGet.CommandLine.XPlat, NuGet.Commands, NuGet.Common, NuGet.Configuration, NuGet.Credentials, NuGet.DependencyResolver.Core, NuGet.Frameworks, NuGet.LibraryModel, NuGet.Localization, NuGet.Packaging, NuGet.ProjectModel, NuGet.Protocol, NuGet.Versioning (Version 7.5.0-rc.16308 -> 7.6.0-rc.16321)
Microsoft.Build.Tasks.Git, Microsoft.SourceLink.AzureRepos.Git, Microsoft.SourceLink.Bitbucket.Git, Microsoft.SourceLink.Common, Microsoft.SourceLink.GitHub, Microsoft.SourceLink.GitLab, Microsoft.TemplateEngine.Abstractions, Microsoft.TemplateEngine.Authoring.TemplateVerifier, Microsoft.TemplateEngine.Edge, Microsoft.TemplateEngine.Mocks, Microsoft.TemplateEngine.Orchestrator.RunnableProjects, Microsoft.TemplateEngine.TestHelper, Microsoft.TemplateEngine.Utils, Microsoft.TemplateSearch.Common, Microsoft.TemplateSearch.TemplateDiscovery (Version 11.0.100-preview.3.26162.108 -> 11.0.100-preview.3.26162.121)
Microsoft.CodeAnalysis, Microsoft.CodeAnalysis.BuildClient, Microsoft.CodeAnalysis.CSharp, Microsoft.CodeAnalysis.CSharp.CodeStyle, Microsoft.CodeAnalysis.CSharp.Features, Microsoft.CodeAnalysis.CSharp.Workspaces, Microsoft.CodeAnalysis.ExternalAccess.HotReload, Microsoft.CodeAnalysis.PublicApiAnalyzers, Microsoft.CodeAnalysis.Workspaces.Common, Microsoft.CodeAnalysis.Workspaces.MSBuild, Microsoft.Net.Compilers.Toolset, Microsoft.Net.Compilers.Toolset.Framework (Version 5.6.0-2.26162.108 -> 5.6.0-2.26162.121)
Microsoft.Deployment.DotNet.Releases (Version 2.0.0-preview.1.26162.108 -> 2.0.0-preview.1.26162.121)
Microsoft.DiaSymReader, System.CommandLine (Version 3.0.0-preview.3.26162.108 -> 3.0.0-preview.3.26162.121)
Microsoft.DotNet.Arcade.Sdk, Microsoft.DotNet.Build.Tasks.Installers, Microsoft.DotNet.Build.Tasks.Templating, Microsoft.DotNet.Build.Tasks.Workloads, Microsoft.DotNet.Helix.Sdk, Microsoft.DotNet.SignTool, Microsoft.DotNet.XliffTasks, Microsoft.DotNet.XUnitExtensions (Version 11.0.0-beta.26162.108 -> 11.0.0-beta.26162.121)
Microsoft.FSharp.Compiler (Version 15.2.100-preview3.26162.108 -> 15.2.100-preview3.26162.121)
Microsoft.NET.Test.Sdk, Microsoft.TestPlatform.Build, Microsoft.TestPlatform.CLI (Version 18.5.0-preview-26162-108 -> 18.5.0-preview-26162-121)
Microsoft.Web.Xdt (Version 3.3.0-preview.3.26162.108 -> 3.3.0-preview.3.26162.121)
[[ commit created by automation ]]
@ViktorHofer
Fix nullability compiler errors from NuGet 7.6 API changes (#53489)
83d346c 
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: ViktorHofer <7412651+ViktorHofer@users.noreply.github.com>
@YuliiaKovalova YuliiaKovalova force-pushed the fix/apphost-taskhost-dotnet-host-path-v2 branch from d700bb9 to d060570 Compare March 18, 2026 08:09
@YuliiaKovalova YuliiaKovalova requested a review from a team as a code owner March 18, 2026 08:09
@YuliiaKovalova YuliiaKovalova marked this pull request as draft March 18, 2026 08:09
@YuliiaKovalova YuliiaKovalova changed the title Set DOTNET_HOST_PATH and enable comm tracing in test environment [DO NOT REVIEW] Set DOTNET_HOST_PATH and enable comm tracing in test environment Mar 18, 2026
@YuliiaKovalova YuliiaKovalova marked this pull request as ready for review March 18, 2026 08:56
@YuliiaKovalova YuliiaKovalova force-pushed the fix/apphost-taskhost-dotnet-host-path-v2 branch 2 times, most recently from 884d327 to c353fb3 Compare March 18, 2026 09:30
@YuliiaKovalova YuliiaKovalova requested review from a team and tmat as code owners March 18, 2026 09:30
@YuliiaKovalova YuliiaKovalova changed the base branch from darc-main-42f55340-3bb4-4b0f-9661-026bcf6564d1 to main March 18, 2026 09:32
@YuliiaKovalova
Add diagnostics for task host MSB4216 failures (no DOTNET_HOST_PATH fix)
5fc024e 
Diagnostics to capture the root cause of MSB4216 on Helix:
- All DOTNET_*/MSBUILD_* env vars from test runner process
- MSBuild properties via injected diagnostic target in blazorwasm.csproj
- SDK layout: apphost presence, permissions, runtimeconfig
- MSBuild debug engine + comm tracing
- NO DOTNET_HOST_PATH fix applied (to reproduce the failure)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@YuliiaKovalova YuliiaKovalova force-pushed the fix/apphost-taskhost-dotnet-host-path-v2 branch from c353fb3 to 5fc024e Compare March 18, 2026 14:35
Copilot AI review requested due to automatic review settings March 18, 2026 14:35
@YuliiaKovalova YuliiaKovalova requested review from a team as code owners March 18, 2026 14:35
Copilot AI reviewed Mar 18, 2026
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@tmat tmat Awaiting requested review from tmat tmat is a code owner

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@YuliiaKovalova @DonnaChen888