I got linked here by @nathanletwory because of this problem i have: Rhino Wip missing lots of Assemblies - System.Drawing, Threading etc
In Rhino mac wip (v8) system drawing is unavailable, and its replacement System.Drawing.Common is not linked. This makes everything involving colors (pointclouds, materials, etc.) not accessible right now. Haven’t tested it on windows yet, but the mac problem remains.
Edit: as written below - this happens in an C# component