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// For complete examples and data files, please go to https://github.com/groupdocsannotation/GroupDocs_Annotation_NET
// Get input file stream
Stream inputFile = new FileStream(CommonUtilities.MapSourceFilePath(filePath), FileMode.Open, FileAccess.ReadWrite);
                
// Initialize list of AnnotationInfo
List<AnnotationInfo> annotations = new List<AnnotationInfo>();

// Polyline annotation
AnnotationInfo polylineAnnotationforwords = new AnnotationInfo
{
    AnnotationPosition = new Point(852.0, 35.0),
    Box = new Rectangle(250f, 35f, 102f, 12f),
    PageNumber = 0,
    PenColor = 1201033,
    PenWidth = 2,
    SvgPath = "M250.8280751173709,48.209295774647885l0.6986854460093896,0l0.6986854460093896,-1.3973708920187793l0.6986854460093896,0l0.6986854460093896,-1.3973708920187793l1.3973708920187793,-0.6986854460093896l0.6986854460093896,-0.6986854460093896l0.6986854460093896,0l2.096056338028169,-1.3973708920187793l3.493427230046948,-1.3973708920187793l0.6986854460093896,-0.6986854460093896l1.3973708920187793,-1.3973708920187793l0.6986854460093896,0l1.3973708920187793,-0.6986854460093896l0.6986854460093896,0l0.6986854460093896,-0.6986854460093896l0.6986854460093896,0l0.6986854460093896,0l0,-0.6986854460093896l0.6986854460093896,0l0.6986854460093896,0l1.3973708920187793,0l0,-0.6986854460093896l0.6986854460093896,0l1.3973708920187793,0l0.6986854460093896,0l1.3973708920187793,0l0.6986854460093896,0l2.096056338028169,-0.6986854460093896l1.3973708920187793,0l0.6986854460093896,0l0.6986854460093896,0l1.3973708920187793,0l1.3973708920187793,0l1.3973708920187793,0l2.096056338028169,0l5.589483568075117,0l1.3973708920187793,0l2.096056338028169,0l0.6986854460093896,0l1.3973708920187793,0l0.6986854460093896,0l1.3973708920187793,0l1.3973708920187793,0l0.6986854460093896,0.6986854460093896l1.3973708920187793,0l2.096056338028169,1.3973708920187793l0.6986854460093896,0l0.6986854460093896,0l0,0.6986854460093896l1.3973708920187793,0l0.6986854460093896,0.6986854460093896l1.3973708920187793,0.6986854460093896l0,0.6986854460093896l0.6986854460093896,0l1.3973708920187793,0.6986854460093896l1.3973708920187793,0.6986854460093896l3.493427230046948,0.6986854460093896l1.3973708920187793,0.6986854460093896l2.096056338028169,0.6986854460093896l1.3973708920187793,0.6986854460093896l1.3973708920187793,0l1.3973708920187793,0.6986854460093896l0.6986854460093896,0l0.6986854460093896,0.6986854460093896l1.3973708920187793,0l0.6986854460093896,0l0.6986854460093896,0l2.7947417840375586,0l1.3973708920187793,0l0.6986854460093896,0l1.3973708920187793,0l0.6986854460093896,0l0.6986854460093896,0l1.3973708920187793,0l0.6986854460093896,0l2.7947417840375586,0l0.6986854460093896,0l2.7947417840375586,0l1.3973708920187793,0l0.6986854460093896,0l0.6986854460093896,0l0.6986854460093896,0l0.6986854460093896,0l0.6986854460093896,0l0.6986854460093896,0l0.6986854460093896,-0.6986854460093896l0.6986854460093896,0",
    Type = AnnotationType.Polyline,
    CreatorName = "Anonym A."
};
// Add annotation to list
annotations.Add(polylineAnnotationforwords);

// Export annotation and save output file
CommonUtilities.SaveOutputDocument(inputFile, annotations, DocumentType.Words);