public void UpdateSlice( 
   SliceDefinition sliceDef
)

//var voxelLayer = ... ;
//Must be on the QueuedTask.Run()

//At 2.x - var slices = voxelLayer.GetSlices();

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

//Do something... e.g. make them visible
foreach (var slice in slices)
{
    slice.IsVisible = true;
    //at 2.x - voxelLayer.UpdateSlice(slice);
    volume.UpdateSlice(slice);
}

//expand the slice container and make sure container visibility is true
voxelLayer.SetSliceContainerExpanded(true);
voxelLayer.SetSliceContainerVisibility(true);

//var voxelLayer = ... ;
//Must be on the QueuedTask.Run()

//To stop the Voxel Exploration Dockpane activating use:
voxelLayer.AutoShowExploreDockPane = false;
//This is useful if u have your own dockpane currently activated...
//Normally, it would be set in your dockpane

if (voxelLayer.Visualization != VoxelVisualization.Volume)
    voxelLayer.SetVisualization(VoxelVisualization.Volume);
voxelLayer.SetSliceContainerVisibility(true);

//At 2.x - var slice = voxelLayer.GetSlices().First(s => s.Name == "Change Tilt Slice");

//Use the SelectedVariableProfile to get the slices currently in the TOC
//via its associated volume
var volume = voxelLayer.SelectedVariableProfile.Volume;
var slice = volume.GetSlices().First(s => s.Name == "Change Tilt Slice");

(double orientation, double tilt) = voxelLayer.GetOrientationAndTilt(slice.Normal);

//Convert orientation and tilt to a normal
slice.Normal = voxelLayer.GetNormal(orientation, 45.0);
//At 2.x - voxelLayer.UpdateSlice(slice);
volume.UpdateSlice(slice);

//reset if needed...Normally this might be when your dockpane
//was de-activated (ie "closed")
voxelLayer.AutoShowExploreDockPane = true;