Engage in a conversation with ASP.NET and SQL Server

I need to create a chat feature using asp.net.

All the chat messages will be stored in a SQL Server database.

Is there a way to display new messages from the database in real time?

How can I get notified when another user sends a message?

I have heard about SqlCacheDependency for polling and pushing updates, but I want to avoid constant page refreshes. Would it be better to use SqlDependency, or maybe utilize ajax instead?

If anyone has any thoughts or suggestions, please share!

Does anyone have a code example they could provide?

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