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SignatureConfig config = Utilities.GetConfigurations();
// instantiating the signature handler
var handler = new SignatureHandler(config);
var signOptions = new WordsSignTextOptions("John Smith");
// specify load options
LoadOptions loadOptions = new LoadOptions();
loadOptions.Password = "1234567890";
string fileExtension = Path.GetExtension(fileName);
Utilities.SaveFile(fileExtension, fileName, handler, signOptions, null, null);