(.NET Core C#) Controlling Charset of HTML Email

This example demonstrates how to change the charset of an HTML email by setting the Charset property.

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

bool success;

Chilkat.Email email = new Chilkat.Email();

// Tell Chilkat you want the email to be utf-8.
email.Charset = "utf-8";

email.From = "somebody@gmail.com";
email.AddTo("Joe","joe_somebody@gmail.com");
email.Subject = "This is a test";

// Load a utf-8 HTML file that will be the body of this email.
// The HTML contains this line to specify the charset:
// 
//     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
// 
// The sample HTML is available here:  https://chilkatsoft.com/exampleData/sample_utf8.html
// 
Chilkat.StringBuilder sbHtml = new Chilkat.StringBuilder();
sbHtml.LoadFile("qa_data/html/sample_utf8.html","utf-8");

email.SetHtmlBody(sbHtml.GetAsString());

// If this email was sent as-is, it would look like this:
Chilkat.MailMan mailman = new Chilkat.MailMan();
Debug.WriteLine(mailman.RenderToMime(email));

// The MIME that would be sent is this:

// 	MIME-Version: 1.0
// 	Date: Wed, 08 Mar 2017 09:39:06 -0600
// 	Message-ID: <53930EB7EFA37B121FB2CC0E57E9FA4D02AD86A3@CHILKAT13>
// 	Content-Type: text/html; charset=utf-8
// 	Content-Transfer-Encoding: quoted-printable
// 	X-Priority: 3 (Normal)
// 	From: somebody@gmail.com
// 	To: Joe <joe_somebody@gmail.com>
// 	Subject: This is a test
// 
// 	<html>
// 	<head>
// 	<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8" />
// 	</head>
// 	<body>
// 	<p>=C3=A0=C3=A8=C3=AC=C3=B2=C3=B9=C3=80=C3=88=C3=8C=C3=92=C3=99=C3=A1=C3=A9=
// 	=C3=AD=C3=B3=C3=BA=C3=BD=C3=81=C3=89=C3=8D=C3=93=C3=9A=C3=9D=C3=A2=C3=AA=C3=
// 	=AE=C3=B4=C3=BB=C3=82=C3=8A=C3=8E=C3=94=C3=9B=C3=A3=C3=B1=C3=B5=C3=83=C3=91=
// 	=C3=95=C3=A4=C3=AB=C3=AF=C3=B6=C3=BC=C3=BF=C3=84=C3=8B=C3=8F=C3=96=C3=9C=C5=
// 	=B8=C3=A5=C3=85</p>
// 	</body>
// 	</html>
// 

// -----------------------------------------
// Let's say we want to send iso-8859-1 instead...
// Just set the email object's Charset property, like this:
email.Charset = "iso-8859-1";

// Now see what would be sent:
Debug.WriteLine(mailman.RenderToMime(email));

// 	MIME-Version: 1.0
// 	Date: Wed, 08 Mar 2017 09:45:03 -0600
// 	Message-ID: <DD08A5B56532AF11505ACF21A1338E0A3024D34A@CHILKAT13>
// 	Content-Type: text/html; charset=iso-8859-1
// 	Content-Transfer-Encoding: quoted-printable
// 	X-Priority: 3 (Normal)
// 	From: somebody@gmail.com
// 	To: Joe <joe_somebody@gmail.com>
// 	Subject: This is a test
// 
// 	<html>
// 	<head><META http-equiv=3D"Content-Type" content=3D"text/html;charset=3Diso-=
// 	8859-1">
// 
// 	</head>
// 	<body>
// 	<p>=E0=E8=EC=F2=F9=C0=C8=CC=D2=D9=E1=E9=ED=F3=FA=FD=C1=C9=CD=D3=DA=DD=E2=EA=
// 	=EE=F4=FB=C2=CA=CE=D4=DB=E3=F1=F5=C3=D1=D5=E4=EB=EF=F6=FC=FF=C4=CB=CF=D6=DC=
// 	=9F=E5=C5</p>
// 	</body>
// 	</html>

// -----------------------------------------
// Let's say we don't want quoted-printable, but instead want 8bit.
// The AddHeaderField method replaces the header field if it already exists.
// Do this to get 8bit encoding instead of quoted-printable.
email.AddHeaderField("Content-Transfer-Encoding","8bit");
// Now see what would be sent:
// (Note: Because RenderToMime returns a string, it generally not possible to render MIME to a string
// IF the MIME contains binary data and uses the 8bit encoding (for example, if a JPEG image was attached).  
// However, the email would still be sent correctly.)
Debug.WriteLine(mailman.RenderToMime(email));

// 	MIME-Version: 1.0
// 	Date: Wed, 08 Mar 2017 09:51:33 -0600
// 	Message-ID: <F38B4A8D33C111057E901782305E01AC5BE31B98@CHILKAT13>
// 	Content-Type: text/html; charset=iso-8859-1
// 	Content-Transfer-Encoding: 8bit
// 	X-Priority: 3 (Normal)
// 	From: somebody@gmail.com
// 	To: Joe <joe_somebody@gmail.com>
// 	Subject: This is a test
// 
// 	<html>
// 	<head><META http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
// 
// 	</head>
// 	<body>
// 	<p>àèìòùÀÈÌÒÙáéíóúýÁÉÍÓÚÝâêîôûÂÊÎÔÛãñõÃÑÕäëïöüÿÄËÏÖÜŸåÅ</p>
// 	</body>
// 	</html>
//