public void CreateSlice( 
   SliceDefinition sliceDef
)

{
  // Note: call within QueuedTask.Run()
  {
    if (voxelLayer.Visualization != VoxelVisualization.Volume)
      voxelLayer.SetVisualization(VoxelVisualization.Volume);
    voxelLayer.SetSliceContainerExpanded(true);
    voxelLayer.SetSliceContainerVisibility(true);

    //To stop the Voxel Exploration Dockpane activating use:
    voxelLayer.AutoShowExploreDockPane = false;
    //This is useful if u have your own dockpane currently activated...

    //Use the SelectedVariableProfile to get the slices currently in the TOC
    //via its associated volume
    var volume = voxelLayer.SelectedVariableProfile.Volume;
    var volumeSize = volume.GetVolumeSize();

    //Orientation 90 degrees (West), Tilt 0.0 (vertical)
    //Convert to a normal
    var normal = voxelLayer.GetNormal(90, 0.0);

    //Create the slice at the voxel mid-point. VoxelPosition
    //is specified in voxel-space coordinates

    //Create the slice on the respective volume
    volume.CreateSlice(new SliceDefinition()
    {
      Name = "Middle Slice",
      VoxelPosition = new Coordinate3D(volumeSize.X / 2, volumeSize.Y / 2, volumeSize.Z / 2),
      Normal = normal,
      IsVisible = true
    });

    //reset if needed...
    voxelLayer.AutoShowExploreDockPane = true;
  }
}