update.ps1

#!/usr/local/bin/powershell
# For this script to work with our Azure DevOps feeds,
# you need to install the credential provider for Azure DevOps:
# https://raw.githubusercontent.com/microsoft/artifacts-credprovider/master/helpers/installcredprovider.ps1
$regex = 'PackageReference Include="([^"]*)" Version="([^"]*)"'

ForEach ($file in get-childitem . -recurse | where {$_.extension -like "*proj"})
{
    $packages = Get-Content $file.FullName |
        select-string -pattern $regex -AllMatches | 
        ForEach-Object {$_.Matches} | 
        ForEach-Object {$_.Groups[1].Value.ToString()}| 
        sort -Unique

    ForEach ($package in $packages)
    {
        write-host "Update $file package :$package"  -foreground 'magenta'
        $fullName = $file.FullName
        $command = "dotnet add $fullName package --interactive $package"
        write-host $command
        iex $command
    }
}