DotNetScanner

DotNetScanner is a free utility which will scan files and folders from your application using only one line of code
Add virus-scanning capabilities to your .Net applications!

DotNetScanner is a free utility which will scan files and folders from your application using only one line of code! DotNetScanner launches your default anti-virus software and uses it to scan for viruses. Protect your users from infected files. DotNetScanner supports Norton Anti-Virus, NOD32, AVG Anti-Virus, F-Prot Anti-Virus and many more!

Requirements:

Microsoft .NET Framework 1.0, 1.1 or 2.0