Here are some great links to check on:

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The Code Project

Open Directory Project

Code Hound

Master C#

Log.cs.txt

Logger for Debug, Warning, Error, etc.. By: Karland International - 12/10/2007 Updated: 01/12/2008

uploadingFiles.asp

Uploading Files - ASP.NET Example

SQLLogin.asp

SQL Login - Shows how to connect to SQL, validate user and password, and error checking for such use.