Rationals
Microsoft Automatic Graph Layout
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Rationals  Microsoft Automatic Graph Layout  

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76  1,319  
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7.8  4.0  
about 1 month ago  about 1 month ago  
C#  JavaScript  
MIT License  GNU General Public License v3.0 or later 
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Rationals
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Microsoft Automatic Graph Layout
 Visual Node Graph with ImGui

Looking for a family tree(Genealogy) API for C#
From my POV you don't need to try to find a special control for family tree but the idea is to use most common library like this. https://github.com/microsoft/automaticgraphlayout Then add you own logic to control the graph.
 The architecture of a simple C# desktop application
What are some alternatives?
MathNet  Math.NET Numerics
MKL.NET  A simple cross platform .NET API for Intel MKL
xamlmath  A collection of .NET libraries for rendering mathematical formulae using the LaTeX typesetting style, for the WPF and Avalonia XAMLbased frameworks
AngouriMath  New opensource crossplatform symbolic algebra library for C# and F#. Can be used for both production and research purposes.
UnitConversion  Expansible Unit Conversion Library for .Net Core and .Net Framework
Math3D  A .NET Standard 2.0 library for simple and efficient 3D math that is a featurerich replacement for System.Numerics https://vimaec.github.io/Math3D
AutoDiff  A .NET library that provides fast, accurate and automatic differentiation (computes derivative / gradient) of mathematical functions.
GeometRi  Simple and lightweight computational geometry library for .Net