Need to Implement c# library

Use only C#
need to implement Face recognition library with the following interfaces
need to complete the project and submit along with source code

build library on the application https://github.com/antlancer-solutions/Simple-Face-Recognition-App-CS.git

private bool TrainImagesFromDir()
{
//use, long Lable and Image<Bgr, Byte> images only
}

private void reconize(Image<Bgr, Byte> currentFrame)
{

return lable;
}

private void updateModel()
{
}

private saveModel()
{
}

private loadModel()
{
}