我有一个Azure管道可以构建我的asp.net core 2.2项目。我使用c＃8.0升级了项目。但是，我的azure管道似乎不支持c＃8.0。如何升级Azure管道以使用c＃8.0？

我已经浏览过azure管道中的选项，但是在升级到c＃8.0时没有发现任何内容

这是生成的YAML文件

pool:
  name: Hosted VS2017
  demands:
  - msbuild
  - visualstudio

steps:
- task: NuGetToolInstaller@0
  displayName: 'Use NuGet 4.4.1'
  inputs:
    versionSpec: 4.4.1

- task: Nugetcommand@2
  displayName: 'NuGet restore'
  inputs:
    restoreSolution: '$(Parameters.solution)'
    vstsFeed: '3e219c03-bc0d-4106-82be-9ff3b21190a5'

- task: VSBuild@1
  displayName: 'Build solution'
  inputs:
    solution: '$(Parameters.solution)'
    msbuildArgs: '/p:DeployOnBuild=true /p:WebPublishMethod=Package /p:PackageAsSingleFile=true /p:SkipInvalidConfigurations=true /p:DesktopBuildPackageLocation="$(build.artifactstagingdirectory)\WebApp.zip" /p:DeployIisAppPath="Default Web Site"'
    platform: '$(BuildPlatform)'
    configuration: '$(BuildConfiguration)'

- task: VSTest@2
  displayName: 'Test Assemblies'
  inputs:
    testAssemblyVer2: |
     **\$(BuildConfiguration)\*test*.dll
     !**\obj\**
    platform: '$(BuildPlatform)'
    configuration: '$(BuildConfiguration)'
    diagnosticsEnabled: True
  enabled: false

- task: PublishSymbols@2
  displayName: 'Publish symbols path'
  inputs:
    SearchPattern: '**\bin\**\*.pdb'
    PublishSymbols: false
  continueonError: true

- task: PublishBuildArtifacts@1
  displayName: 'Publish Artifact'
  inputs:
    PathtoPublish: '$(build.artifactstagingdirectory)'
    ArtifactName: '$(Parameters.ArtifactName)'
  condition: succeededOrFailed()

我希望该项目能够生成，但是它给了我这个错误： CSC : error CS1617: Invalid option '8.0' for /langversion. Use '/langversion:?' to list supported values.