NewBlend

FamilyItemFactory.NewBlend(Boolean, CurveArray, CurveArray, SketchPlane, CurveArray, CurveArray)

isSolid	Boolean	Indicates if the Blend is Solid or Void.
profile1	CurveArray	The first blend section. It should represent a single, planar curve loop.
profile2	CurveArray	The second blend section. It should represent a single, planar curve loop lying in a plane parallel to that of the first blend section.
sketchPlane	SketchPlane	The sketch plane for the first profile. Use this to associate the "base" of the blend to geometry from another element. Optional, it can be <span class="keyword">null</span><span class="nu">a null reference (<span class="keyword">Nothing</span> in Visual Basic)</span> if you want Revit to derive a new sketch plane from the geometry of the base profile.
topProfile	CurveArray	The top blend section. It should consist of only one curve loop. The input profile must be in one plane.
baseProfile	CurveArray	The base blend section. It should consist of only one curve loop. The input profile must be in one plane.
→ returns	Blend	If creation was successful the new blend is returned, otherwise an exception with failure information will be thrown.