SharpDX -- MeshGeometry3D -- Normals property

hi there,

in helixwpf, the Normals property for a MeshGeometry3D are provided as a sequence of String as follows:

 <MeshGeometry3D Normals="0,1,0 0,1,0 0,0.99620003,-0.087200001 0,0.99620003,-0.087200001 1,0,0 1,0,0 1,0,0 1,0,0 0,-1,0 0,-1,0 0,-0.99620003,0.087200001 0,-0.99620003,0.087200001 -1,0,0
-1,0,0 -1,0,0 -1,0,0 0,0.98479998,-0.1736 0,0.98479998,-0.1736 1,0,0>

...for example.
In the SharpDF version of MeshGeometry3D I'll get an error, says TypeConverter isn't able to convert the sequence to Vector3D[].

The MeshGeometry3D is the result of an import of wavefront.obj model into VSBlend.
Someone has any ideas?