function Remove-Utf8Bom {
    <#
    .SYNOPSIS
        Removes a UTF8 BOM from a file.
    .DESCRIPTION
        Removes a UTF8 BOM from a file if the BOM appears to be present.

        The UTF8 BOM is identified by the byte sequence 0xEF 0xBB 0xBF at the beginning of the file.
    .EXAMPLE
        Remove-Utf8Bom -Path c:\file.txt

        Remove a BOM from a single file.
    .EXAMPLE
        Get-ChildItem c:\folder -Recurse -File | Remove-Utf8Bom

        Remove the BOM from every file returned by Get-ChildItem.
    #>

    [CmdletBinding()]
    param (
        # The path to a file which should be updated.
        [Parameter(Mandatory, Position = 1, ValueFromPipeline, ValueFromPipelineByPropertyName)]
        [ValidateScript( { Test-Path $_ -PathType Leaf } )]
        [Alias('FullName')]
        [String]$Path
    )

    begin {
        $encoding = [System.Text.UTF8Encoding]::new($false)
    }

    process {
        $Path = $pscmdlet.GetUnresolvedProviderPathFromPSPath($Path)

        try {
            $bom = [Byte[]]::new(3)
            $stream = [System.IO.File]::OpenRead($Path)
            $null = $stream.Read($bom, 0, 3)
            $stream.Close()

            if ([BitConverter]::ToString($bom, 0) -eq 'EF-BB-BF') {
                [System.IO.File]::WriteAllLines(
                    $Path,
                    [System.IO.File]::ReadAllLines($Path),
                    $encoding
                )
            } else {
                Write-Verbose ('A UTF8 BOM was not detected on the file {0}' -f $Path)
            }
        } catch {
            Write-Error -ErrorRecord $_
        }
    }
}