This is a simple pushbullet wrapper written in C#. You can easily add this library to your project via Nuget (https://www.nuget.org/packages/PushBulletSharp/).
There are examples of how to use the library in the test project included. Remember to provide your api key when running the tests.
For more documentation and examples, check out the Wiki (updated as of 01/24/2018 for 3.1.0).
Subscribe to the PushbulletSharp channel for updates on releases: https://www.pushbullet.com/channel?tag=pushbulletsharp