Fix bug in syntax highlighting class which displays C# attribute declarations incorrectly.
Fix bug in syntax highlighting class which displays C# attribute declarations incorrectly.

NuGetPackageExplorer/NuGetPackageExplorer,BreeeZe/NuGetPackageExplorer,campersau/NuGetPackageExplorer,dsplaisted/NuGetPackageExplorer,NuGetPackageExplorer/NuGetPackageExplorer