General 1 rail sweep. If you are not producing the sweep results that you are after, then use the SweepOneRail class with options to generate the swept geometry

Namespace: Rhino.Geometry
Assembly: RhinoCommon (in RhinoCommon.dll) Version: Rhino 6.0

C#

public static Brep[] CreateFromSweep(
	Curve rail,
	IEnumerable<Curve> shapes,
	bool closed,
	double tolerance
)

VB

Public Shared Function CreateFromSweep ( 
	rail As Curve,
	shapes As IEnumerable(Of Curve),
	closed As Boolean,
	tolerance As Double
) As Brep()

rail

Type: Rhino.Geometry.Curve
Rail to sweep shapes along

shapes

Type: System.Collections.Generic.IEnumerable(Curve)
Shape curves

closed

Type: System.Boolean
Only matters if shapes are closed

tolerance

Type: System.Double
Tolerance for fitting surface and rails

Type: Brep[]
Array of Brep sweep results

Supported in: 6.0.16224.21491, 5D58w

Brep Class
CreateFromSweep Overload
Rhino.Geometry Namespace