Enhance Dotnet performance

1. Avoid excessive round trips to the server.


2. Use Page.IsPostback.


3. Enable or disable viewstate accordingly.


4. Use Response.Write for String concatenation.


5. Never use exceptions as a way to control normal program flow.


6. Use stored procedures.


7. Cache data and output wherever possible.


8. Disable Session State when not in use.


9. Use SqlDataReader for a fast-forward, read-only data cursor.