如何在不使用文件路径的情况下将二进制文件附加到Powershell中的$SMTPMessage.Attachments.Add

$binaryData = Get-Content -Encoding Byte -Path "C:\path\to\file.bin"
$base64String = [System.Convert]::ToBase64String($binaryData)

$attachment = New-Object System.Net.Mail.Attachment
$attachment.ContentStream = [System.IO.MemoryStream]::new([System.Convert]::FromBase64String($base64String))
$SMTPMessage.Attachments.Add($attachment)

$SMTPMessage = New-Object System.Net.Mail.MailMessage
$SMTPMessage.Subject = "Email Subject"
$SMTPMessage.Body = "Email Body"
$SMTPMessage.From = "sender@example.com"
$SMTPMessage.To.Add("recipient@example.com")

$binaryData = Get-Content -Encoding Byte -Path "C:\path\to\file.bin"
$base64String = [System.Convert]::ToBase64String($binaryData)

$attachment = New-Object System.Net.Mail.Attachment
$attachment.ContentStream = [System.IO.MemoryStream]::new([System.Convert]::FromBase64String($base64String))
$SMTPMessage.Attachments.Add($attachment)

$SMTPClient = New-Object System.Net.Mail.SmtpClient("smtp.example.com", 587)
$SMTPClient.EnableSsl = $true
$SMTPClient.Credentials = New-Object System.Net.NetworkCredential("username", "password")
$SMTPClient.Send($SMTPMessage)