We have developed a library for graphviz-dot in C#: csdot
The package is published on NuGet: NuGet Gallery | csdot 1.0.3
GitHub Link: GitHub - harshsikhwal/csdot: A c# based DOT (graphviz) framework
Feel free to use it. Let us know if you have any suggestions/issues and lock the same on GitHub.
Looking forward for your love and support.