Check for nuget consolidation across your solution

nuget-consolidation.ps1

Get-ChildItem -Recurse -Depth 5 -Path "." |
    ? { $_.Name -eq "packages.config" } |
    % { ([xml](Get-Content -Path $_.FullName)).packages.package | select id, version } |
    Group-Object -Property id |
    select Name, @{ Name="Versions"; Expression= { $_.Group | select -ExpandProperty version -Unique }} |
    ? { $_.Versions.Count -gt 1 } | 
    Sort-Object -Property Name |
    % { Write-Error "Package '$($_.Name)' has multiple versions used across the solution! $($_.Versions)" }