Deconstructing Surface

Hello I am trying to build a componant for Grasshopper that deconstructs a surface but I cannot find the syntax to access the specific Curve or Point3d data of the surface input. Is there anyone that can help me with this?

You must search in Rhinocommon documentation,
https://developer.rhino3d.com/api/RhinoCommon/html/T_Rhino_Geometry_NurbsSurface.htm
Surely Knot vector in Properties !!

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