.NET Cloud SDK cho việc thao tác Watermark

//Get your App SID, App Key and Storage Name at https://dashboard.groupdocs.cloud (free registration is required).
public class AddTextWatermarks
    {
        public static void Run()
        {
            var configuration = new Configuration(Common.MyAppSid, Common.MyAppKey);
            var apiInstance = new WatermarkApi(configuration);

            try
            {
                var fileInfo = new FileInfo
                {
                    FilePath = "documents/sample.docx",
                    StorageName = Common.MyStorage
                };

                var options = new WatermarkOptions()
                {
                    FileInfo = fileInfo,
                    WatermarkDetails = new List
                    {
                        new WatermarkDetails
                        {
                            TextWatermarkOptions = new TextWatermarkOptions
                            {
                                Text = "New watermark text",
                                FontFamilyName = "Arial",
                                FontSize = 12d,
                            }
                        }
                    }
                };

                var request = new AddRequest(options);

                var response = apiInstance.Add(request);
                Console.WriteLine("Resultant file path: " + response.Path);
            }
            catch (Exception e)
            {
                Console.WriteLine("Exception while calling WatermarkApi: " + e.Message);
            }
        }
    }
}