Install .NET CORE

Author: qiluo-msft

.azure-pipelines/build-template.yml

@@ -58,6 +58,7 @@ jobs:
     displayName: "Compile sonic swss common with coverage enabled"
   - ${{ if eq(parameters.run_unit_test, true) }}:
     - script: |
+        set -ex
         sudo pip install Pympler==0.8
         sudo apt-get install -y redis-server
         sudo sed -i 's/notify-keyspace-events ""/notify-keyspace-events AKE/' /etc/redis/redis.conf
@@ -79,6 +80,14 @@ jobs:
   - publish: $(System.DefaultWorkingDirectory)/
     artifact: ${{ parameters.artifact_name }}
     displayName: "Archive swss common debian packages"
+  - script: |
+      set -ex
+      # Install .NET CORE
+      curl -sSL https://packages.microsoft.com/keys/microsoft.asc | sudo apt-key add -
+      sudo apt-add-repository https://packages.microsoft.com/debian/10/prod
+      sudo apt-get update
+      sudo apt-get install -y dotnet-sdk-5.0
+    displayName: "Install .NET CORE"
   - task: PublishCodeCoverageResults@1
     inputs:
       codeCoverageTool: Cobertura