public class CustomDocumentHandler : IDocumentHandler
{
	public DocumentInfo GetInfo(string inputFile)
	{
            // Either provide a file name with extension  
            return new DocumentInfo(uniqueId, fileName);

            // Or specify an explicit document format if you don't have a file name
            return new DocumentInfo(uniqueId, null, DocumentFormat.Docx);
            // which can also be written as
            return new DocumentInfo(uniqueId, format: DocumentFormat.Docx);
	}

	public StreamResult OpenRead(string inputFile, InputOptions inputOptions)
	{
		return new StreamResult(stream);
	}
}