Encoding with IO.File

I need to reada large file (1,5 Gb).

For performance issues, I'm trying to use the [IO.File] instead of the Get-Content, but am having trouble withaccents.

Follows the script.

    $r = [IO.File]::OpenText($Nome_Arquivo)
    while ($r.Peek() -ge 0) {
        $Linha = $r.ReadLine()
        $Linha
    }
    $r.Dispose()

Fábio de Paula Junior