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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>();

// Initialize text annotation.
AnnotationInfo textAnnotationforwords = new AnnotationInfo
{
    Box = new Rectangle((float)265.44, (float)153.86, 206, 36),
    PageNumber = 0,
    SvgPath = "[{\"x\":265.44,\"y\":388.83},{\"x\":472.19,\"y\":388.83},{\"x\": 265.44,\"y\":349.14},{\"x\":472.19,\"y\":349.14}]",
    Type = AnnotationType.Text,
    CreatorName = "Anonym A."
};

// Add annotation to list
annotations.Add(textAnnotationforwords);

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