Create flow diagram programmatically

Julian,

Please check out GraphSharp: http://graphsharp.codeplex.com/Release/ProjectReleases.aspx

Small/open source C# library on Git renders to HTML5 (You can modify to render to for example WPF or Winform as well)

https://gridwizard.wordpress.com/2015/03/25/simple-c-library-to-render-graph-to-flowchart