public Coordinate3D Coordinate3D {get;}

// node coordinates
var coord3D = node.Coordinate3D;
var mapPoint = node.ToMapPoint();
// is the node "inside"
var isInsideNode = node.IsInsideDataArea;

// get all other nodes connected to "node" 
IReadOnlyList<ArcGIS.Core.Data.Analyst3D.TinNode> adjNodes = node.GetAdjacentNodes();

// get all edges that share "node" as a from node. 
IReadOnlyList<ArcGIS.Core.Data.Analyst3D.TinEdge> edges = node.GetIncidentEdges();

// get all triangles that share "node"
IReadOnlyList<ArcGIS.Core.Data.Analyst3D.TinTriangle> triangles = node.GetIncidentTriangles();