Quick script to find files with UTF-8 BOMs and rewrite them without the BOM

remove-all-boms.ps1

param(
    [string] $Folder = ".",
    [string] $Filter = "*.*"
)

Get-ChildItem -Path $Folder -Recurse -File -Filter $Filter -Exclude @('obj','bin') | Foreach-Object {
    $contents = [System.IO.File]::ReadAllBytes($_.FullName)
    if ($contents.Length -gt 2 -and $contents[0] -eq 0xEF -and $contents[1] -eq 0xBB -and $contents[2] -eq 0xBF) {
        Write-Host $_.FullName
        [System.IO.File]::WriteAllBytes($_.FullName, $bytes[3..$($bytes.Length)])
    }
}