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 text part...
foreach (TextBodyPart part in msg.BodyParts)
{
    // Show the type of the text part.
    Console.WriteLine(string.Format("Text part {0} headers values:", part.AsMimePart.ContentType));

    // For every header...
    foreach (Header hdr in part.Headers)
    {
        // Show the value of the header.
        Console.WriteLine(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")

Dim part As TextBodyPart
Dim hdr As Header

' For every text part...
For Each part In msg.BodyParts
    ' Show the type of the text part.
    Console.WriteLine(String.Format("Text part {0} headers values:", part.AsMimePart.ContentType))

    ' For every header...
    For Each hdr In part.Headers
        ' Show the value of the header.
        Console.WriteLine(hdr.Value)
    Next
Next