diff --git a/Directory.Packages.props b/Directory.Packages.props
index 1cb3496760..2e56ac1556 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -65,7 +65,6 @@
     <PackageVersion Include="System.Threading.Tasks.Extensions" Version="$(SystemThreadingTasksExtensionsVersion)" />
   </ItemGroup>
   <ItemGroup Label="Test dependencies">
-    <PackageVersion Include="Codecov" Version="1.12.3" />
     <PackageVersion Include="AwesomeAssertions" Version="9.4.0" />
     <PackageVersion Include="FSharp.Core" Version="11.0.100" />
     <PackageVersion Include="NUnit" Version="4.6.0" />
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 37f9367e1f..1243ed43aa 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -130,8 +130,9 @@ stages:
           #     ValidateTestHostEnvironmentVariablesAsync hard-fails the run on non-NETCoreApp hosts
           #     (see src/Platform/Microsoft.Testing.Extensions.CrashDump/CrashDumpEnvironmentVariableProvider.cs),
           #     and this glob mixes net4x and net8+/net9+ hosts.
-          #   --coverage — Codecov upload is Debug-only (see "Upload coverage to codecov.io" step
-          #     below), so collecting coverage in Release would just write unused .coverage files.
+          #   --coverage — coverage upload is Debug-only (see "Merge coverage" / "Publish coverage to
+          #     Azure DevOps" steps below), so collecting coverage in Release would just write unused
+          #     .coverage files.
           - script: dotnet test --no-build --test-modules "artifacts/bin/*UnitTests*/$(_BuildConfig)/**/*UnitTests.exe" --results-directory $(BUILD.SOURCESDIRECTORY)\artifacts\TestResults\$(_BuildConfig) --no-progress --output detailed --report-trx --report-trx-filename "{asm}_{tfm}.trx" --report-azdo --report-azdo-progress --report-azdo-summary --report-junit --report-junit-filename "{asm}_{tfm}.xml" --hangdump --hangdump-timeout 15m --diagnostic --diagnostic-output-directory $(BUILD.SOURCESDIRECTORY)\artifacts\log\$(_BuildConfig) --diagnostic-verbosity trace
             name: TestRelease
             displayName: Test (unit tests only)
@@ -160,13 +161,19 @@ stages:
               ArtifactName: Integration_Tests_Windows_Binlogs_$(_BuildConfig)
             condition: and(always(), eq(variables._BuildConfig, 'Debug'))
 
-          # Upload code coverage to codecov.io
-          - script: dotnet msbuild -restore
-              eng/CodeCoverage.proj
-              /p:Configuration=$(_BuildConfig)
-              /bl:$(BUILD.SOURCESDIRECTORY)\artifacts\log\$(_BuildConfig)\CodeCoverage.binlog
-            displayName: Upload coverage to codecov.io
-            condition: and(succeeded(), eq(variables._BuildConfig, 'Debug'))
+          # Publish coverage to Azure DevOps. PublishCodeCoverageResults@2 accepts the binary
+          # .coverage format Microsoft Code Coverage emits natively (per
+          # https://learn.microsoft.com/azure/devops/pipelines/tasks/reference/publish-code-coverage-results-v2:
+          # "The task supports all kinds of coverage formats such as: .coverage, .covx, .covb,
+          # .cjson, .xml, .lcov, pycov, etc."), and merges multiple files via the minimatch glob.
+          # Coverage shows up in the build's "Code Coverage" tab and on the build summary, one
+          # click from the GitHub PR status check (we used to upload to codecov.io here).
+          - task: PublishCodeCoverageResults@2
+            displayName: 'Publish coverage to Azure DevOps'
+            inputs:
+              summaryFileLocation: '$(Build.SourcesDirectory)/artifacts/TestResults/$(_BuildConfig)/*.coverage'
+              pathToSources: '$(Build.SourcesDirectory)/src'
+            condition: and(succeededOrFailed(), eq(variables._BuildConfig, 'Debug'))
 
           - task: PublishBuildArtifacts@1
             displayName: 'Publish local dumps'
diff --git a/codecov.yml b/codecov.yml
deleted file mode 100644
index 28165ad155..0000000000
--- a/codecov.yml
+++ /dev/null
@@ -1,22 +0,0 @@
-# https://docs.codecov.io/docs/codecov-yaml
-# https://github.com/codecov/support/wiki/Codecov-Yaml
-
-coverage:
-  status:
-    project:
-      default: false
-    patch:
-      default: false
-  fixes:
-    - "eng/src/::src/"
-
-comment:
-  layout: "diff, flags, files"
-
-flags:
-  production:
-    paths:
-      - src/
-  test:
-    paths:
-      - test/
diff --git a/eng/CodeCoverage.proj b/eng/CodeCoverage.proj
deleted file mode 100644
index c336517d96..0000000000
--- a/eng/CodeCoverage.proj
+++ /dev/null
@@ -1,91 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk" DefaultTargets="Codecov">
-
-  <PropertyGroup>
-    <!-- We need to specify a framework in order for the Restore target to work -->
-    <TargetFramework>$(NetCurrent)</TargetFramework>
-    <ArtifactsCoverageDir>$(ArtifactsDir)coverage\</ArtifactsCoverageDir>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Codecov" Version="$(CodecovVersion)" GeneratePathProperty="true" />
-  </ItemGroup>
-
-  <Target Name="GatherCoverageInputs">
-    <PropertyGroup>
-      <_CodecovPath>$(PkgCodecov)\tools\Codecov.exe</_CodecovPath>
-      <_LocalDotNetPath>$(DotNetRoot)\dotnet.exe</_LocalDotNetPath>
-      <MergedFullCoverageDirectory>$(ArtifactsCoverageDir)full\</MergedFullCoverageDirectory>
-      <MergedUnitCoverageDirectory>$(ArtifactsCoverageDir)unit\</MergedUnitCoverageDirectory>
-      <MergedIntegrationCoverageDirectory>$(ArtifactsCoverageDir)integration\</MergedIntegrationCoverageDirectory>
-      <CoberturaFileName>Cobertura.xml</CoberturaFileName>
-    </PropertyGroup>
-
-    <ItemGroup>
-      <_CoverageReports Include="$(ArtifactsTestResultsDir)\*.coverage" />
-      <_CoverageReports Include="@(_CoverageReports->'&quot;%(Identity)&quot;', ' ')" />
-      <_UnitCoverageReports Include="@(_CoverageReports)" Condition="$([System.String]::Copy('%(Identity)').Contains('.UnitTests_'))" />
-      <_UnitCoverageReports Include="@(_UnitCoverageReports->'&quot;%(Identity)&quot;', ' ')" />
-      <_IntegrationCoverageReports Include="@(_CoverageReports)" Condition="$([System.String]::Copy('%(Identity)').Contains('.IntegrationTests_'))" />
-      <_IntegrationCoverageReports Include="@(_IntegrationCoverageReports->'&quot;%(Identity)&quot;', ' ')" />
-    </ItemGroup>
-  </Target>
-
-  <Target Name="MergeCoverage" DependsOnTargets="GatherCoverageInputs">
-    <!-- Merge multiple coverlet reports into a single Cobertura report before uploading to codecov.io, in order to
-      reduce upload size and load on the codecov.io processing servers. -->
-    <Message Importance="high" Text="&quot;$(_LocalDotNetPath)&quot; coverage merge @(_CoverageReports) --output &quot;$(MergedFullCoverageDirectory)$(CoberturaFileName)&quot; --output-format Cobertura" />
-    <Exec Condition="'@(_CoverageReports)' != ''" Command="&quot;$(_LocalDotNetPath)&quot; coverage merge @(_CoverageReports) --output &quot;$(MergedFullCoverageDirectory)$(CoberturaFileName)&quot; --output-format Cobertura" ConsoleToMsBuild="true" />
-
-    <!-- Merge multiple coverlet reports into a single Cobertura report before uploading to codecov.io, in order to
-      reduce upload size and load on the codecov.io processing servers. -->
-    <Message Importance="high" Text="&quot;$(_LocalDotNetPath)&quot; coverage merge @(_UnitCoverageReports) --output &quot;$(MergedUnitCoverageDirectory)$(CoberturaFileName)&quot; --output-format Cobertura" />
-    <Exec Condition="'@(_UnitCoverageReports)' != ''" Command="&quot;$(_LocalDotNetPath)&quot; coverage merge @(_UnitCoverageReports) --output &quot;$(MergedUnitCoverageDirectory)$(CoberturaFileName)&quot; --output-format Cobertura" ConsoleToMsBuild="true" />
-
-    <!-- Merge multiple coverlet reports into a single Cobertura report before uploading to codecov.io, in order to
-      reduce upload size and load on the codecov.io processing servers. -->
-    <Message Importance="high" Text="&quot;$(_LocalDotNetPath)&quot; coverage merge @(_IntegrationCoverageReports) --output &quot;$(MergedIntegrationCoverageDirectory)$(CoberturaFileName)&quot; --output-format Cobertura" />
-    <Exec Condition="'@(_IntegrationCoverageReports)' != ''" Command="&quot;$(_LocalDotNetPath)&quot; coverage merge @(_IntegrationCoverageReports) --output &quot;$(MergedIntegrationCoverageDirectory)$(CoberturaFileName)&quot; --output-format Cobertura" ConsoleToMsBuild="true" />
-  </Target>
-
-  <Target Name="Codecov" DependsOnTargets="MergeCoverage">
-
-    <ItemGroup>
-      <_CodecovFullArgs Include="-f;$(MergedFullCoverageDirectory)$(CoberturaFileName)" />
-      <_CodecovUnitArgs Include="-f;$(MergedUnitCoverageDirectory)$(CoberturaFileName)" />
-      <_CodecovIntegrationArgs Include="-f;$(MergedIntegrationCoverageDirectory)$(CoberturaFileName)" />
-
-      <!-- Report an error if the upload fails -->
-      <_CodecovArgs Include="--required" />
-
-      <_CodecovFlags Include="$(Configuration)" Condition="'$(Configuration)' != ''" />
-      <_CodecovProductionFlags Include="@(_CodecovFlags)" />
-      <_CodecovProductionFlags Include="production" />
-      <_CodecovTestFlags Include="@(_CodecovFlags)" />
-      <_CodecovTestFlags Include="test" />
-
-      <_CodecovProductionUnitFlags Include="@(_CodecovProductionFlags)" />
-      <_CodecovProductionUnitFlags Include="unit" />
-      <_CodecovTestUnitFlags Include="@(_CodecovTestFlags)" />
-      <_CodecovTestUnitFlags Include="unit" />
-
-      <_CodecovProductionIntegrationFlags Include="@(_CodecovProductionFlags)" />
-      <_CodecovProductionIntegrationFlags Include="integration" />
-      <_CodecovTestIntegrationFlags Include="@(_CodecovTestFlags)" />
-      <_CodecovTestIntegrationFlags Include="integration" />
-    </ItemGroup>
-
-    <!-- Upload the unit test coverage file with a 'production' flag, which will be filtered by codecov.io to production code -->
-    <Message Importance="high" Text="&quot;$(_CodecovPath)&quot; @(_CodecovUnitArgs, ' ') @(_CodecovArgs, ' ') --flag @(_CodecovProductionUnitFlags, ',')" />
-    <Exec Condition="'@(_UnitCoverageReports)' != ''" Command="&quot;$(_CodecovPath)&quot; @(_CodecovUnitArgs, ' ') @(_CodecovArgs, ' ') --flag @(_CodecovProductionUnitFlags, ',')" />
-
-    <!-- Upload the integration test coverage file with a 'production' flag, which will be filtered by codecov.io to production code -->
-    <Message Importance="high" Text="&quot;$(_CodecovPath)&quot; @(_CodecovIntegrationArgs, ' ') @(_CodecovArgs, ' ') --flag @(_CodecovProductionIntegrationFlags, ',')" />
-    <Exec Condition="'@(_IntegrationCoverageReports)' != ''" Command="&quot;$(_CodecovPath)&quot; @(_CodecovIntegrationArgs, ' ') @(_CodecovArgs, ' ') --flag @(_CodecovProductionIntegrationFlags, ',')" />
-
-    <!-- Upload the full test coverage file with a 'test' flag, which will be filtered by codecov.io to test code. We
-    don't further separate this by integration vs. unit tests because the answer is clear from the file path. -->
-    <Message Importance="high" Text="&quot;$(_CodecovPath)&quot; @(_CodecovFullArgs, ' ') @(_CodecovArgs, ' ') --flag @(_CodecovTestFlags, ',')" />
-    <Exec Condition="'@(_CoverageReports)' != ''" Command="&quot;$(_CodecovPath)&quot; @(_CodecovFullArgs, ' ') @(_CodecovArgs, ' ') --flag @(_CodecovTestFlags, ',')" />
-  </Target>
-
-</Project>
diff --git a/eng/pipelines/steps/test-non-windows.yml b/eng/pipelines/steps/test-non-windows.yml
index 736ec44328..4d68eb1e71 100644
--- a/eng/pipelines/steps/test-non-windows.yml
+++ b/eng/pipelines/steps/test-non-windows.yml
@@ -47,8 +47,9 @@ steps:
 #     ValidateTestHostEnvironmentVariablesAsync hard-fails the run on non-NETCoreApp hosts
 #     (see src/Platform/Microsoft.Testing.Extensions.CrashDump/CrashDumpEnvironmentVariableProvider.cs).
 #     Skipped here too for cross-platform parity with the Windows script (mixed net4x+netcoreapp glob).
-#   --coverage — Codecov upload is Debug-only (see "Upload coverage to codecov.io" step
-#     in azure-pipelines.yml), so collecting coverage in Release would just write unused .coverage files.
+#   --coverage — coverage upload is Debug-only (see "Merge coverage" / "Publish coverage to
+#     Azure DevOps" steps in azure-pipelines.yml), so collecting coverage in Release would just
+#     write unused .coverage files.
 - script: dotnet test --no-build --test-modules "artifacts/bin/*UnitTests*/$(_BuildConfig)/**/*UnitTests.dll" --results-directory $(BUILD.SOURCESDIRECTORY)/artifacts/TestResults/$(_BuildConfig) --no-progress --output detailed --report-trx --report-trx-filename "{asm}_{tfm}.trx" --report-azdo --report-azdo-progress --report-azdo-summary --report-junit --report-junit-filename "{asm}_{tfm}.xml" --hangdump --hangdump-timeout 15m --diagnostic --diagnostic-output-directory $(BUILD.SOURCESDIRECTORY)/artifacts/log/$(_BuildConfig) --diagnostic-verbosity trace
   name: TestRelease
   displayName: Test (unit tests only)