Microsoft for security issues, completely put ASP.net ajax cross domain Exchange function to the closed. Cross Domain Ajax does give hackers a chance to attack if they are not very sophisticated and careful. However, cross domain Ajax is a very useful and even important technology, if the big head like Yahoo, Google and so on, completely cross domain Ajax to seal off, and ajax.net is unfavorable.
On the other hand, asp.net Ajax is really good, convenient, and integrated with Visual Studio, if you can take advantage of ASP.net Ajax, but also to achieve cross domain, while still ensuring security, it is not very beautiful things.
The old man did it, not only to achieve the security of cross domain Ajax, but also to bypass Microsoft in ASP.net ajax in the cross domain request of the blockade, full use of asp.net ajax development convenience. Haha, this, I do not know that there are other people in the world have done it.
&l