What is the correct way to remove an entity and all of its collection data?

Question

In Eyeshot, what is the best way to remove an Entity from the Model that is a BlockReference?
Are there methods to help clean up all the Blocks based on BlockReference?

// assume "model1" is the Eyeshot control 

List<Entity> entities = GetEntitiesToRemove();
foreach (var entity in entities)
{
   if (entity is BlockReference reference)
   {
       // What to do here to clean up the associated blocks?  This code will only find the
       // parent block for the entity
       var block = model1.Blocks.FirstOrDefault(b => b.Name == reference.BlockName);
       if (block != null)
       {
           model1.Blocks.Remove(block);  //This is only removing the parent block 
       }
   }
   model1.Entities.Remove(entity);
}

Answer 1

Model.Purge() method: Removes unused items from the Environment master collections (Layers, Blocks, Materials, etc.)