Hello, I did share.

[liuww111]

https://www.cnblogs.com/RainbowInTheSky/p/10247921.html
Thank you for your packing.
Small suggestion：
Errors in using Chinese，I used GB2312，is OK

[takuya-takeuchi]

thanks.

It is not issue of FRDT but DlibDotNet.

This method is called frequency anywhere.
If improve, expose encoding value and user can change it.

DlibDotNet.StringEncoding = "gb2312"; // static property

[takuya-takeuchi]

Hi, I update package to 1.2.3.7.
Could you try the following code in the head of your code?

FaceRecognition.InternalEncoding = System.Text.Encoding.GetEncoding("gb2312");

...

This property changes encoding which convert System.String to byte[] in DlibDotNet.
This function allows user to choice encoding.
It could work.