diff --git a/.vsts-dotnet-ci.yml b/.vsts-dotnet-ci.yml
index 7c57db485d..66e5832a32 100644
--- a/.vsts-dotnet-ci.yml
+++ b/.vsts-dotnet-ci.yml
@@ -1,6 +1,6 @@
-################################################################################
+###############################################################################
 # ML.NET's PR validation build
-################################################################################
+###############################################################################
 
 resources:
   containers:
@@ -8,64 +8,73 @@ resources:
     image: microsoft/dotnet-buildtools-prereqs:centos-7-b46d863-20180719033416
 
 phases:
-- template: /build/ci/phase-template.yml
-  parameters:
-    name: core30
-    buildScript: build.cmd
-    customMatrixes:
-      Build_Debug_Intrinsics:
-        _configuration: Debug-Intrinsics
-        _config_short: DI
-        _includeBenchmarkData: false
-      Build_Release_Intrinsics:
-        _configuration: Release-Intrinsics
-        _config_short: RI
-        _includeBenchmarkData: true
-    queue:
-      name: Hosted VS2017
+- ${{ if ne(variables['codeCoverageBuild'], 'true') }}:
+  - template: /build/ci/phase-template.yml
+    parameters:
+      name: core30
+      buildScript: build.cmd
+      customMatrixes:
+        Build_Debug_Intrinsics:
+          _configuration: Debug-Intrinsics
+          _config_short: DI
+          _includeBenchmarkData: false
+        Build_Release_Intrinsics:
+          _configuration: Release-Intrinsics
+          _config_short: RI
+          _includeBenchmarkData: true
+      queue:
+        name: Hosted VS2017
 
-- template: /build/ci/phase-template.yml
-  parameters:
-    name: Linux
-    buildScript: ./build.sh
-    queue:
-      name: Hosted Ubuntu 1604
-      container: LinuxContainer
+  - template: /build/ci/phase-template.yml
+    parameters:
+      name: Linux
+      buildScript: ./build.sh
+      queue:
+        name: Hosted Ubuntu 1604
+        container: LinuxContainer
 
-- template: /build/ci/phase-template.yml
-  parameters:
-    name: MacOS
-    buildScript: ./build.sh
-    queue:
-      name: Hosted macOS
+  - template: /build/ci/phase-template.yml
+    parameters:
+      name: MacOS
+      buildScript: ./build.sh
+      queue:
+        name: Hosted macOS
 
-- template: /build/ci/phase-template.yml
-  parameters:
-    name: Windows_NetFx
-    buildScript: build.cmd
-    customMatrixes:
-      Build_Debug_netfx:
-        _configuration: Debug-netfx
-        _config_short: DFX
-        _includeBenchmarkData: false
-      Build_Release_netfx:
-        _configuration: Release-netfx
-        _config_short: RFX
-        _includeBenchmarkData: false
-    queue:
-      name: Hosted VS2017
+  - template: /build/ci/phase-template.yml
+    parameters:
+      name: Windows_NetFx
+      buildScript: build.cmd
+      customMatrixes:
+        Build_Debug_netfx:
+          _configuration: Debug-netfx
+          _config_short: DFX
+          _includeBenchmarkData: false
+        Build_Release_netfx:
+          _configuration: Release-netfx
+          _config_short: RFX
+          _includeBenchmarkData: false
+      queue:
+        name: Hosted VS2017
 
-- template: /build/ci/phase-template.yml
-  parameters:
-    name: Windows_x64
-    buildScript: build.cmd
-    queue:
-      name: Hosted VS2017
+  - template: /build/ci/phase-template.yml
+    parameters:
+      name: Windows_x64
+      buildScript: build.cmd
+      queue:
+        name: Hosted VS2017
 
-- template: /build/ci/phase-template.yml
-  parameters:
-    name: Windows_x86
-    architecture: x86
-    buildScript: build.cmd
-    queue:
-      name: Hosted VS2017
\ No newline at end of file
+  - template: /build/ci/phase-template.yml
+    parameters:
+      name: Windows_x86
+      architecture: x86
+      buildScript: build.cmd
+      queue:
+        name: Hosted VS2017
+
+- ${{ if eq(variables['codeCoverageBuild'], 'true') }}:
+  - template: /build/ci/phase-template.yml
+    parameters:
+      name: Windows_x64
+      buildScript: build.cmd
+      queue:
+        name: Hosted VS2017    
\ No newline at end of file
diff --git a/build/ci/phase-template.yml b/build/ci/phase-template.yml
index c7a9303c60..088a03ad90 100644
--- a/build/ci/phase-template.yml
+++ b/build/ci/phase-template.yml
@@ -6,69 +6,132 @@ parameters:
   customMatrixes: ''
 
 phases:
-  - phase: ${{ parameters.name }}
-    variables:
-      _buildScript: ${{ parameters.buildScript }}
-      _phaseName: ${{ parameters.name }}
-      _arch: ${{ parameters.architecture }}
-    queue:
-      timeoutInMinutes: 45
-      parallel: 99
-      matrix:
-        ${{ if eq(parameters.customMatrixes, '') }}:
-          Build_Debug:
-            _configuration: Debug
-            _config_short: D
-            _includeBenchmarkData: false
-          Build_Release:
-            _configuration: Release
-            _config_short: R
-            _includeBenchmarkData: true
-        ${{ if ne(parameters.customMatrixes, '') }}:
-          ${{ insert }}: ${{ parameters.customMatrixes }}
-      ${{ insert }}: ${{ parameters.queue }}
-    steps:
-    - script: $(_buildScript) -$(_configuration) -buildArch=$(_arch)
-      displayName: Build
-    - script: $(_buildScript) -- /t:DownloadExternalTestFiles /p:IncludeBenchmarkData=$(_includeBenchmarkData)
-      displayName: Download Benchmark Data
-    - ${{ if eq(parameters.name, 'MacOS') }}:
-      - script: brew update && brew install libomp mono-libgdiplus gettext && brew link gettext --force
-        displayName: Install runtime dependencies
-    - script: $(_buildScript) -$(_configuration) -runtests
-      displayName: Run Tests
-    - task: PublishTestResults@2
-      displayName: Publish Test Results
-      condition: succeededOrFailed()
-      inputs:
-        testRunner: 'vSTest'
-        searchFolder: '$(System.DefaultWorkingDirectory)/bin'
-        testResultsFiles: '**/*.trx'
-        testRunTitle: Machinelearning_Tests_$(_phaseName)_$(_configuration)_$(Build.BuildNumber)
-        configuration: $(_configuration)
-        mergeTestResults: true
-    - task: CopyFiles@2
-      displayName: Stage build logs
-      condition: not(succeeded())
-      inputs:
-        sourceFolder: $(Build.SourcesDirectory)
-        contents: '?(msbuild.*|binclash.log|init-tools.log)'
-        targetFolder: $(Build.ArtifactStagingDirectory)
-    - task: CopyFiles@2
-      displayName: Stage test output
-      condition: not(succeeded())
-      inputs:
-        sourceFolder: $(Build.SourcesDirectory)/bin
-        contents: |
-          **/TestOutput/**/*
-          **/*.trx
-        targetFolder: $(Build.ArtifactStagingDirectory)
-    - task: PublishBuildArtifacts@1
-      displayName: Publish build and test logs
-      condition: not(succeeded())
-      inputs:
-        pathToPublish: $(Build.ArtifactStagingDirectory)
-        artifactName: ${{ parameters.name }} $(_config_short)
-        artifactType: container
-    - script: $(_buildScript) -buildPackages
-      displayName: Build Packages
+  - ${{ if ne(variables['codeCoverageBuild'], 'true') }}:
+    - phase: ${{ parameters.name }}
+      variables:
+        _buildScript: ${{ parameters.buildScript }}
+        _phaseName: ${{ parameters.name }}
+        _arch: ${{ parameters.architecture }}
+      queue:
+        timeoutInMinutes: 45
+        parallel: 99
+        matrix:
+          ${{ if eq(parameters.customMatrixes, '') }}:
+            Build_Debug:
+              _configuration: Debug
+              _config_short: D
+              _includeBenchmarkData: false
+            Build_Release:
+              _configuration: Release
+              _config_short: R
+              _includeBenchmarkData: true
+          ${{ if ne(parameters.customMatrixes, '') }}:
+            ${{ insert }}: ${{ parameters.customMatrixes }}
+        ${{ insert }}: ${{ parameters.queue }}
+      steps:
+      - script: $(_buildScript) -$(_configuration) -buildArch=$(_arch)
+        displayName: Build
+      - script: $(_buildScript) -- /t:DownloadExternalTestFiles /p:IncludeBenchmarkData=$(_includeBenchmarkData)
+        displayName: Download Benchmark Data
+      - ${{ if eq(parameters.name, 'MacOS') }}:
+        - script: brew update && brew install libomp mono-libgdiplus gettext && brew link gettext --force
+          displayName: Install runtime dependencies
+      - script: $(_buildScript) -$(_configuration) -runtests
+        displayName: Run Tests
+      - task: PublishTestResults@2
+        displayName: Publish Test Results
+        condition: succeededOrFailed()
+        inputs:
+          testRunner: 'vSTest'
+          searchFolder: '$(System.DefaultWorkingDirectory)/bin'
+          testResultsFiles: '**/*.trx'
+          testRunTitle: Machinelearning_Tests_$(_phaseName)_$(_configuration)_$(Build.BuildNumber)
+          configuration: $(_configuration)
+          mergeTestResults: true
+      - task: CopyFiles@2
+        displayName: Stage build logs
+        condition: not(succeeded())
+        inputs:
+          sourceFolder: $(Build.SourcesDirectory)
+          contents: '?(msbuild.*|binclash.log|init-tools.log)'
+          targetFolder: $(Build.ArtifactStagingDirectory)
+      - task: CopyFiles@2
+        displayName: Stage test output
+        condition: not(succeeded())
+        inputs:
+          sourceFolder: $(Build.SourcesDirectory)/bin
+          contents: |
+            **/TestOutput/**/*
+            **/*.trx
+          targetFolder: $(Build.ArtifactStagingDirectory)
+      - task: PublishBuildArtifacts@1
+        displayName: Publish build and test logs
+        condition: not(succeeded())
+        inputs:
+          pathToPublish: $(Build.ArtifactStagingDirectory)
+          artifactName: ${{ parameters.name }} $(_config_short)
+          artifactType: container
+      - script: $(_buildScript) -buildPackages
+        displayName: Build Packages
+
+  - ${{ if eq(variables['codeCoverageBuild'], 'true') }}:
+    - phase: ${{ parameters.name }}
+      variables:
+        _buildScript: ${{ parameters.buildScript }}
+        _phaseName: ${{ parameters.name }}
+        _arch: ${{ parameters.architecture }}
+      queue:
+        timeoutInMinutes: 90
+        parallel: 99
+        matrix:
+          ${{ if eq(parameters.customMatrixes, '') }}:
+            Build_Debug:
+              _configuration: Debug
+              _config_short: D
+              _includeBenchmarkData: false
+          ${{ if ne(parameters.customMatrixes, '') }}:
+            ${{ insert }}: ${{ parameters.customMatrixes }}
+        ${{ insert }}: ${{ parameters.queue }}
+      steps:
+      - script: $(_buildScript) -$(_configuration) -buildArch=$(_arch) -codeCoverage
+        displayName: Build
+      - script: $(_buildScript) -- /t:DownloadExternalTestFiles /p:IncludeBenchmarkData=$(_includeBenchmarkData)
+        displayName: Download Benchmark Data
+      - ${{ if eq(parameters.name, 'MacOS') }}:
+        - script: brew update && brew install libomp mono-libgdiplus gettext && brew link gettext --force
+          displayName: Install runtime dependencies
+      - script: $(_buildScript) -$(_configuration) -runtests
+        displayName: Run Tests
+      - task: PublishTestResults@2
+        displayName: Publish Test Results
+        condition: succeededOrFailed()
+        inputs:
+          testRunner: 'vSTest'
+          searchFolder: '$(System.DefaultWorkingDirectory)/bin'
+          testResultsFiles: '**/*.trx'
+          testRunTitle: Machinelearning_Tests_$(_phaseName)_$(_configuration)_$(Build.BuildNumber)
+          configuration: $(_configuration)
+          mergeTestResults: true
+      - task: CopyFiles@2
+        displayName: Stage build logs
+        condition: not(succeeded())
+        inputs:
+          sourceFolder: $(Build.SourcesDirectory)
+          contents: '?(msbuild.*|binclash.log|init-tools.log)'
+          targetFolder: $(Build.ArtifactStagingDirectory)
+      - task: CopyFiles@2
+        displayName: Stage test output
+        condition: not(succeeded())
+        inputs:
+          sourceFolder: $(Build.SourcesDirectory)/bin
+          contents: |
+            **/TestOutput/**/*
+            **/*.trx
+          targetFolder: $(Build.ArtifactStagingDirectory)
+      - task: PublishBuildArtifacts@1
+        displayName: Publish build and test logs
+        condition: not(succeeded())
+        inputs:
+          pathToPublish: $(Build.ArtifactStagingDirectory)
+          artifactName: ${{ parameters.name }} $(_config_short)
+          artifactType: container
\ No newline at end of file
diff --git a/config.json b/config.json
index c870004f32..05e404bd90 100644
--- a/config.json
+++ b/config.json
@@ -154,6 +154,12 @@
             "RunTests": "default"
           }
         },
+        "codeCoverage": {
+          "description": "Enables code coverage.",
+          "settings": {
+            "CodeCoverage": "true"
+          }
+        },
         "verbose": {
           "description": "Passes /flp:v=diag to the msbuild command or the value passed by the user.",
           "settings": {