C# programs detected by SONAR

Hello everyone, my hobby is to make programs in Microsoft .NET C#. A few months ago one of my programs was detected by Nortons SONAR. Since then, almost every program I make has a 'suspicious' behaviour, according to SONAR. I know you can configure SONAR so that certain directories won't be scanned, but I'm just curious why my programs are 'unsafe'. My question is: Are there ways to make my programs less suspicious for SONAR? Furthermore, I can't find what kind of threat SONAR.heuristic.130 is. Can anyone tell me?

Thanks in advance,

Bart van der Hoeven