We’re delighted to share the release of the 1st edition of the Essential Guide to C# Scripting for Grasshopper. This latest publication by McNeel is intended for designers experienced in Grasshopper visual scripting, who would like to take their skills to the next level to create their own custom scripts using the C# programming language. This guide does not assume nor require any background in programming. It includes a description of the C# component in Grasshopper, an overview of C# programming basics, and a detailed review of the RhinoCommon geometry. It also includes a few examples of design algorithms implemented using C# in Grasshopper.