[NPANDAY-578] fix determination of framework versions This will attempt to discover them in both v4.0 and v2.0 Microsoft.Build libraries, so we need to make sure it doesn't throw an exception looking for newer versions in old libraries and instead just skips them.
incubator/npanday/trunk/dotnet/assemblies/NPanday.ProjectImporter/Engine/src/main/csharp/Converter/Algorithms/AbstractPomConverter.cs