<p>How can I fetch data in a Winforms application or ASP.NET form from a SAP database? The .NET framework used is 2.0. , language is C# and SAP version is 7.10. </p>

Why don't you contact CA and ask them to tell them what they're searching for, for that virus?
Or, you could copy the file and change each individual byte until the warning disappeared (may take a while depending on the size).
It's possible the virus detection may be a lot more complicated than simply looking for a fixed string.