PDF Document

//Load an existing document.
PdfLoadedDocument ldoc = new PdfLoadedDocument("input.pdf");
//Initialize new instance of PdfCompressionOptions class.
PdfCompressionOptions options = new PdfCompressionOptions();
//set the compress images based on the image quality. 
options.CompressImages = true;
//set the image quality.
options.ImageQuality = 50;
//set the optimize font.
options.OptimizeFont = true;
//set the optimize page contents.
options.OptimizePageContents = true;
//set the remove metadata informations.
options.RemoveMetadata = true;
ldoc.CompressionOptions = options;
//Save and close the document.
ldoc.Save("Output.pdf");
ldoc.Close(true);