Function Get-DotnetExtraRuntimes {
    <#
.SYNOPSIS
    Gets extra runtimes for dotnet. Ensure that we only keep the latest around.
    This assumes that minors are as distinct as majors. Supply the flag RemoveNonMajorDupes to get non-latest minors per major.

.PARAMETER RemoveNonMajorDupes
    Only consider majors as "unique"

.PARAMETER ReturnExpiredRuntimes
    Returns the out of date runtimes

.EXAMPLE
    Get-DotnetExtraRuntimes
#>

    [CmdletBinding()]
    [OutputType([System.Array])]
    param(
        [switch]$RemoveNonMajorDupes,
        [switch]$ReturnExpiredRuntimes
    )

    $logLead = Get-LogLeadName
    $deleteRuntimes = @()
    $allRuntimes = @{}

    $runtimes = dotnet --list-runtimes
    Write-Host "$logLead : Dotnet Runtimes installed on local machine:"
    foreach ($runtime in $runtimes) {
        Write-Host "$logLead : $runtime"
        $runtimeParentPath = (($runtime -split '\[')[1] -split '\]')[0]
        $runtimeApp = ($runtime -split ' ')[0]
        $runtimeVersion = [System.Version]($runtime -split ' ')[1]
        $runtimePath = (Join-Path $runtimeParentPath $runtimeVersion)

        if ($allRuntimes.Keys -notcontains $runtimeApp) {
            Write-Verbose "$logLead : adding version $runtimePath"
            $allRuntimes[$runtimeApp] = @{ Version = [System.Version]$runtimeVersion; Path = $runtimePath; };
        }
        if ($allRuntimes[$runtimeApp].Version.Major -lt $runtimeVersion.Major) {
        } elseif ($allRuntimes[$runtimeApp].Version.Minor -lt $runtimeVersion.Minor -and $RemoveNonMajorDupes) {
            Write-Verbose "$logLead : adding delete runtime $($allRuntimes[$runtimeApp].Path)"
            $deleteRuntimes += $allRuntimes[$runtimeApp].Path;
        } elseif ($allRuntimes[$runtimeApp].Version.Build -lt $runtimeVersion.Build) {
            Write-Verbose "$logLead : adding delete runtime $($allRuntimes[$runtimeApp].Path)"
            $deleteRuntimes += $allRuntimes[$runtimeApp].Path;
        }
        $allRuntimes[$runtimeApp] = @{ Version = $runtimeVersion; Path = $runtimePath; };
    }

    Write-Host "$logLead : Dotnet Runtimes that should be deleted/out of date:"
    foreach ($deleteRuntime in $deleteRuntimes) {
        Write-Host "$logLead : $deleteRuntime"
    }
    if ($ReturnExpiredRuntimes) {
        Return $deleteRuntimes
    }
}