public static FormFieldNewFile WithValue(this FormFieldNewFile formField, NewFile file)
 {
     formField.Value = new List <NewFile> {
         file
     };
     return(formField);
 }
 public static FormFieldNewFile AddValue(this FormFieldNewFile formField, NewFile attachment)
 {
     formField.Value.Add(attachment);
     return(formField);
 }