I am not sure that this i right place to post this.
But last few months Avast reports Z Extension Methods as virus.
This is not a threat. That is .net FOSS lib.
This is their site: Z Extension Methods
This is their source: https://zextensionmethods.codeplex.com/SourceControl/latest
Lib. itself is very useful. It has quite a few usefule linq, DB, and array functions. Here is description:
Z Extension Methods Library enhances the .NET Framework by adding hundreds of new methods. It drastically increases developers productivity and code readability.
Here is how avast reported it: