Download any file from internet with spliting

Aug 27 2011 12:19 AM

A file (Any format) ,size 2 GB ,i want to download this file from internet with spliting

Example rafeeq.avi file .This file split to 1 GB and 1 GB then simultaneously download .after download i want to merge these file to 2GB.How to possible in c# windows base code ?
By this model download we can reduce time