.NET Framework Target

[Kiingy]

Trying to add this to a project via NuGet always seems to return the following error:

Could not install package 'PushBulletSharp.Core 1.0.4'. You are trying to install this package into a project that targets '.NETFramework,Version=vX.Y', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.

I tried several projects with different framework targets (including 2.2) and it was always the same error.

Not sure if I'm doing something wrong on my end.