Asp.net callback [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 11 years ago. 开发者_StackOverflow社区

I am trying to learn how to create a more real time callback from one client to another within asp.net. I did a little googleing and found asp.net callbacks with script manager within asp.net. What is the best pattern and practice for creating an on demand website between mutiple clients? Is the scriptmanager and detecting the current user that is signed it best practice?(

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Use jQuery's AJAX functionality and ASP.Net WebServices to pass JSON data back and forth. Easy. If that's what you're talking about... I don't quite get it.