Converts files to UTF8

convert_to_utf8.ps1

function Get-FileEncoding
{
    [CmdletBinding()] Param (
     [Parameter(Mandatory = $True, ValueFromPipelineByPropertyName = $True)] [string]$Path
    )

    [byte[]]$byte = get-content -Encoding byte -ReadCount 4 -TotalCount 4 -Path $Path

    if ( $byte[0] -eq 0xef -and $byte[1] -eq 0xbb -and $byte[2] -eq 0xbf )
    { Write-Output 'UTF8 BOM' }
    elseif ($byte[0] -eq 0xfe -and $byte[1] -eq 0xff)
    { Write-Output 'Unicode' }
    elseif ($byte[0] -eq 0 -and $byte[1] -eq 0 -and $byte[2] -eq 0xfe -and $byte[3] -eq 0xff)
    { Write-Output 'UTF32' }
    elseif ($byte[0] -eq 0x2b -and $byte[1] -eq 0x2f -and $byte[2] -eq 0x76)
    { Write-Output 'UTF7'}
    elseif ($byte[0] -eq 0xff -and $byte[1] -eq 0xfe ) 
    { Write-Output '1200' }
    elseif( $byte[0] -eq 0x3c -and $byte[1] -eq 0x25 -and $byte[2] -eq 0x40 ) 
    { Write-Output 'UTF8' }
    else
    { Write-Output 'ASCII' }
}

function ChangeEncoding ($baseDirectory)
{
        $allFiles = Get-ChildItem $baseDirectory -include *.aspx -recurse | where-object { -not $_.PSIsContainer }
        foreach( $file in $allFiles){          
            $encoding = Get-FileEncoding $file.FullName           
            if( "UTF8 BOM" -ne $encoding ) {                        
             if( "1200" -eq $encoding ) {
               $rawContent = get-content $file.FullName -encoding byte
               $fileContent = [System.Text.Encoding]::GetEncoding(1200).GetString($rawContent)              
               $fileContent | set-content -encoding utf8  $file.FullName -force
             } else {
               $fileContent = get-content $file.FullName -encoding $encoding -force
               $fileContent | set-content -encoding utf8  $file.FullName -force
             }
            }
           "$file --- $encoding"
         }
}