An example of a simple YAML pipeline for a c# proj

greeter.yaml

trigger:
  - none

pool:
  vmImage: 'windows-latest'

jobs: 
- job: Build
  steps: 
  - task: DotNetCoreCLI@2
    displayName: 'Restore Greeter Project'
    inputs:
      command: restore
      projects: GreeterProject/GreeterApp/GreeterApp.csproj
      feedsToUse: config
      nugetConfigPath: ./nuget.config

  - task: DotNetCoreCLI@2
    displayName: 'Build Greeter'
    inputs:
      command: build
      arguments: '--no-restore --configuration $(buildConfiguration)'
      projects: GreeterProject/GreeterApp/GreeterApp.csproj

  - task: DotNetCoreCLI@2
    displayName: 'Restore Greeter Tests'
    inputs:
      command: restore
      projects: GreeterProject/GreeterTests/GreeterTests.csproj
      feedsToUse: config
      nugetConfigPath: ./nuget.config

  - task: DotNetCoreCLI@2
    displayName: 'Build Greeter tests'
    inputs:
      projects: GreeterProject/GreeterTests/GreeterTests.csproj
      arguments: '--no-restore --configuration $(BuildConfiguration)'

  - task: DotNetCoreCLI@2
    displayName: 'Test Greeter'
    inputs:
      command: 'test'
      projects: GreeterProject/GreeterTests/GreeterTests.csproj
      arguments: ' --no-build --configuration $(buildConfiguration)'
            
  - task: DotNetCoreCLI@2
    displayName: 'Publish the Project zip'
    inputs:
      command: publish
      publishWebProjects: false
      projects: GreeterProject/GreeterApp/GreeterApp.csproj
      arguments: '--no-build --configuration $(buildConfiguration) --output $(Build.ArtifactStagingDirectory)/$(buildConfiguration)'
      zipAfterPublish: True

  - task: PublishBuildArtifacts@1
    displayName: 'Publish Artifact: drop'
    condition: succeeded()