converting IEnumerable<TSource> into IEnumerable<IEnumerable<TSource>>?

[GoogleCodeExporter]

hi,
How can i convert my Source as IEnumerable<IEnumerable<TSource>>
from IEnumerable<TSource> and pass it to the  

IEnumerable<IEnumerable<T>> Transpose<T>(this IEnumerable<IEnumerable<T>> 
source){}


How to do this.please any help will be appriciated..

Thanks,

Original issue reported on code.google.com by sampath....@gmail.com on 11 Dec 2013 at 10:04