public IList<SliceDefinition> GetSlices()

//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()

//At 2.x -
//var slice = voxelLayer.GetSlices().FirstOrDefault();
//var slice2 = voxelLayer.GetSlices().First(s => s.Id == my_slice_id);

//Use the SelectedVariableProfile to get the slices currently in the TOC
//via its associated volume
var volume = voxelLayer.SelectedVariableProfile.Volume;
var slice = volume.GetSlices().FirstOrDefault();
var slice2 = volume.GetSlices().First(s => s.Id == my_slice_id);

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

//At 2.x
//var last_slice = voxelLayer.GetSlices().LastOrDefault();
//   if (last_slice != null)
//     voxelLayer.DeleteSlice(last_slice);

//   //Delete all slices
//   var slices = voxelLayer.GetSlices();
//   foreach (var slice in slices)
//     voxelLayer.DeleteSlice(slice);

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

var last_slice = volume.GetSlices().LastOrDefault();
if (last_slice != null)
    volume.DeleteSlice(last_slice);

//Delete all slices
var slices = volume.GetSlices();
foreach (var slice in slices)
    volume.DeleteSlice(slice);