How can I access the encoding of the DisplayName property in MailAddress

Hi,
The third constructor of [Mail​Address](https://docs.microsoft.com/en-us/dotnet/api/system.net.mail.mailaddress.-ctor?view=netframework-4.7), MailAddress(String, String, Encoding.

The third parameter is, displayNameEncoding Encoding
The Encoding that defines the character set used for displayName.

But when I have a instance of Mail​Address, how can I get the encoding of the displayname?

I am not sure if there is the correct place for me to give the feedback,but I can not leave a comment in [document](https://docs.microsoft.com/en-us/dotnet/api/system.net.mail.mailaddress.-ctor?view=netframework-4.7)