Как интегрировать pdf4me с помощью C #

Question

using Pdf4meClient;

//  You can provide a generated token to initialise authorization. 
Pdf4meClient.Pdf4me.Instance.Init(token);

// optimization for maximal memory size reduction (profile: max) 
byte[] optimizedPdf = await Pdf4meClient.Pdf4me.Instance.
    OptimizeClient.OptimizeByProfileAsync(OptimizeActionProfile.Max,File.ReadAllBytes("PDF_to_Optimise.pdf"));

// and writing the optimized PDF to disk
File.WriteAllBytes("Optimized.pdf", optimizedPdf);