I want to Add multiple images and other data at a time WCF

Question

I'm new to WCF, I want to upload multiple images at a time using WCF from client, The scenario is : I have 20 questions and each question may have 0 to 2 images , So I have to request to the service to save all data, What are the possible ways to get it right?, I'm trying to get from last two days, But I'm able insert one Image at a time....