public HeaderCollection Headers { get; }

Public ReadOnly Property Headers As HeaderCollection
	Get

// To use the code below, import MailBee namespaces at the top of your code.
using MailBee;
using MailBee.Mime;

// The actual code (put it into a method of your class)

// Load the message from file.
MailMessage msg = new MailMessage();
msg.LoadMessage(@"C:\Docs\TestMail.eml");

// For every attachment...
foreach (Attachment attach in msg.Attachments)
{
    // ...show the name of the attachment and iterate through its headers.
    Console.WriteLine("Headers of " + attach.Filename + " attachment:");

    // For every header...
    foreach (Header hdr in attach.Headers)
    {
        // ...show the header name and value.
        Console.WriteLine(hdr.Name + ": " + hdr.Value);
    }
}

' To use the code below, import MailBee namespaces at the top of your code.
Imports MailBee
Imports MailBee.Mime

' The actual code (put it into a method of your class)

' Load the message from file.
Dim msg As New MailMessage
msg.LoadMessage("C:\Docs\TestMail.eml")

' For every attachment...
For Each attach As Attachment In msg.Attachments
    ' ...show the name of the attachment and iterate through its headers.
    Console.WriteLine("Headers of " & attach.Name & " attachment:")

    ' For every header...
    For Each hdr As Header In attach.Headers
        ' ...show the header name and value.
        Console.WriteLine(hdr.Name & ": " & hdr.Value)
    Next
Next