function Remove-DuplicateHostsFileRecords {
<#
.SYNOPSIS
    Removes duplicate entries from the hostfile, preferring the longest comment in the case of duplicate entries
    Assumes that a distinct record is IpAddress + Hostname

.PARAMETER Records
    A list of two or more records. An empty array or one that has only one element will be returned as-is.
    A list of records of the format @{ Keep = $false; IpAddress = $null; Hostname = $null; Comment = $null; BlankLine = $false; }
#>
    [CmdletBinding()]
    [OutputType([object[]])]
    param (
        [Object[]]$Records
    )

    # If we have no records, or only one record, how can we remove duplicates?
    if ((Test-IsCollectionNullOrEmpty $Records) -or ($Records.Count -eq 1)) {
        return $Records
    }

    $hash = @{}
    foreach ($record in $Records) {
        if ([string]::IsNullOrWhiteSpace($record.IpAddress) -and [string]::IsNullOrWhiteSpace($record.Hostname)) {
            continue
        } else {
            $indexString = "$($record.IpAddress)$($record.Hostname)".ToLower()
            $formattedRecord = Format-HostsFileRecord -Record $record
            if ($null -eq $hash[$indexString]) {
                $hash[$indexString] = $formattedRecord
            }
            if ($formattedRecord.Length -gt $hash[$indexString].Length) {
                $hash[$indexString] = $formattedRecord
            }
        }
    }

    $outputRecords = @()
    foreach ($record in $Records) {
        if ([string]::IsNullOrWhiteSpace($record.IpAddress) -and [string]::IsNullOrWhiteSpace($record.Hostname)) {
            $outputRecords += $record
        } else {
            $indexString = "$($record.IpAddress)$($record.Hostname)".ToLower()
            $formattedRecord = Format-HostsFileRecord -Record $record

            # There should have been a record here, so we must have removed it
            if ($null -eq $hash[$indexString]) {
                continue
            }

            if ($formattedRecord.Length -eq $hash[$indexString].Length) {
                $outputRecords += $record

                # Only keep the first one that matches, get rid of all the rest by hitting the above fork
                $hash[$indexString] = $null
            }
        }
    }

    return $outputRecords
}