NuGetUpload.cs

$source = 'https://pkgs.dev.azure.com/xamarin/public/_packaging/SkiaSharp/nuget/v3/index.json'

$check = 'https://pkgs.dev.azure.com/xamarin/6fd3d886-57a5-4e31-8db7-52a1b47c07a8/_packaging/737d9830-bed0-4b55-8699-c93e7b529ed0/nuget/v3/flat2/PACKAGE_ID/PACKAGE_VERSION/PACKAGE_ID.PACKAGE_VERSION.nupkg'

$nupkgs = (Get-ChildItem *.nupkg)

$total = $nupkgs.Count
Write-Host "Total: $total"

$counter = 0;
foreach ($nupkg in $nupkgs) {
    $fname = $nupkg.Name.Replace('.nupkg', '').ToLower()
    Write-Host "START: $fname"

    $fname -match '([A-Za-z\.]+)\.(.*)' | Out-Null
    $cUrl = $check.Replace('PACKAGE_ID', $Matches[1]).Replace('PACKAGE_VERSION', $Matches[2])

    try {
        $request = [System.Net.WebRequest]::Create($curl)
        $response = $request.GetResponse()
        $status = $response.StatusCode
        $response.Close()
    } catch {
        $status = "Not Found"
    }

    if ($status -ne 'OK') {
        dotnet nuget push $nupkg --source $source --api-key az --skip-duplicate --timeout 3000
    }

    $counter++;
    $percent = "{0:P}" -f ($counter / $total)
    Write-Host "END: $fname ($percent)"
}