(.NET Core C#) Parse MIME to get Binary Data (such as GIF, JPG, or any binary file)

Demonstrates how to parse a MIME to get binary data. This example extracts the image data for a GIF image to an in-memory byte array, and also to a file.

This example uses a MIME test file located at http://www.chilkatsoft.com/testData/sampleMime2.txt. It contains the following MIME:

Content-Type: multipart/mixed;
 boundary="------------080707010302060306060800";

This is a multi-part message in MIME format.

--------------080707010302060306060800
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

This is the plain-text body.
--------------080707010302060306060800
Content-Disposition: attachment; filename="starfish.gif";
Content-Transfer-Encoding: base64
Content-Type: image/gif; name="starfish.gif";

R0lGODlhIAAgAPcAAP///+/v7/f39+/n5/fv7//39/fn597OzufW1tbGxs69vffe3u/W1salpZQQ
EIQYEJwQCJQYCJwYCM6clL2Ee5wpGIwhEK0YANatpdalnHMYCKUhCJQYAKUYAM6Ec5QhCJwhCPfW
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--------------080707010302060306060800--

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// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Mime mime = new Chilkat.Mime();

// Load the sampleMime2.txt file into the MIME object.
// (This file is available at https://www.chilkatsoft.com/testData/sampleMime2.txt )

bool success = mime.LoadMimeFile("sampleMime2.txt");
if (success == false) {
    Debug.WriteLine(mime.LastErrorText);
    return;
}

// The GIF image is the 2nd sub-part located directly under the
// top-level MIME node.  Indexing begins at 0, therefore the 2nd
// sub-part is at index 1.
Chilkat.Mime part2 = mime.GetPart(1);

byte[] binaryData = null;

// The GetBodyBinary method returns the binary bytes
// of the part's body, automatically decoded from whatever
// content-transfer-encoding might be used (such as base64).
binaryData = part2.GetBodyBinary();

// We now have the binary bytes of the GIF image in binaryData.
// Save it to a file.
Chilkat.FileAccess fac = new Chilkat.FileAccess();
success = fac.WriteEntireFile("out1.gif",binaryData);
if (success != true) {
    Debug.WriteLine(fac.LastErrorText);
    return;
}

// An easier way to save the body content to a file,
// assuming your application does not need to access
// the binary data in-memory, is to call SaveBody
success = part2.SaveBody("out2.gif");
if (success == false) {
    Debug.WriteLine(part2.LastErrorText);
    return;
}

Debug.WriteLine("Finished.");