parameters:
    SdkVersion: '' # required

steps:
-   pwsh: |
        $found = (Test-Path -Path "${Env:ToolsDirectory}\dotnet\sdk\${Env:SdkVersion}")
        Write-Host -Object ".NET Core SDK ${Env:SdkVersion}: $(If (${found}) {'found'} Else {'NOT found'})"
        Write-Host -Object "##vso[task.setvariable variable=NeedsSdk]$(If (${found}) {'0'} Else {'1'})"
    name: 'Test_CoreSdk'
    displayName: 'Check for .NET SDK ${{ parameters.SdkVersion }}'
    failOnStderr: false
    errorActionPreference: continue
    ignoreLASTEXITCODE: true
    env:
        ToolsDirectory: '$(Agent.ToolsDirectory)'
        SdkVersion: '${{ parameters.SdkVersion }}'

-   task: UseDotNet@2
    name: 'Install_CoreSdk'
    displayName: 'Use .NET SDK ${{ parameters.SdkVersion }}'
    inputs:
        packageType: 'sdk'
        version: '${{ parameters.SdkVersion }}'
    condition: ne(variables['NeedsSdk'], '0')