Question: I want to multiple photos in one go. How to implement uploading multiple photos in one go?

Answer: 
I've used this several times in the past, and find its a great way to upload multiple images. It tracks the upload progress too:

<http://www.codeproject.com/KB/aspnet/FlashUpload.aspx>
Check below link:

<http://www.c-sharpcorner.com/UploadFile/prathore/MultipleImagesUpload05122009042335AM/MultipleImagesUpload.aspx>