SEToolbox.Models.ExplorerModel.SaveCheckPointAndSandBox C# (CSharp) Method

        public void SaveCheckPointAndSandBox()
        {
            IsBusy = true;
            ActiveWorld.SaveCheckPointAndSector(true);

            // Manages the adding of new voxel files.
            foreach (var entity in Structures)
            {
                if (entity is StructureVoxelModel)
                {
                    var voxel = (StructureVoxelModel)entity;
                    if (voxel.SourceVoxelFilepath != null && File.Exists(voxel.SourceVoxelFilepath))
                    {
                        // Any asteroid that already exists with same name, must be removed.
                        if (File.Exists(voxel.VoxelFilepath))
                        {
                            FileSystem.DeleteFile(voxel.VoxelFilepath, UIOption.OnlyErrorDialogs, RecycleOption.SendToRecycleBin);
                        }

                        if (Path.GetExtension(voxel.SourceVoxelFilepath).Equals(MyVoxelMap.V1FileExtension, StringComparison.InvariantCultureIgnoreCase))
                        {
                            // Convert between formats.
                            var voxelmap = new MyVoxelMap();
                            voxelmap.Load(voxel.SourceVoxelFilepath, SpaceEngineersCore.Resources.GetDefaultMaterialName(), true);
                            voxelmap.Save(voxel.VoxelFilepath);
                        }
                        else
                        {
                            File.Copy(voxel.SourceVoxelFilepath, voxel.VoxelFilepath);
                        }
                        voxel.SourceVoxelFilepath = null;
                    }
                }

                if (entity is StructurePlanetModel)
                {
                    var voxel = (StructurePlanetModel)entity;
                    if (voxel.SourceVoxelFilepath != null && File.Exists(voxel.SourceVoxelFilepath))
                    {
                        // Any asteroid that already exists with same name, must be removed.
                        if (File.Exists(voxel.VoxelFilepath))
                        {
                            FileSystem.DeleteFile(voxel.VoxelFilepath, UIOption.OnlyErrorDialogs, RecycleOption.SendToRecycleBin);
                        }

                        File.Copy(voxel.SourceVoxelFilepath, voxel.VoxelFilepath);
                        voxel.SourceVoxelFilepath = null;
                    }
                }

            }

            // Manages the removal old voxels files.
            foreach (var file in SpaceEngineersCore.ManageDeleteVoxelList)
            {
                var filename = Path.Combine(ActiveWorld.Savepath, file);
                if (File.Exists(filename))
                {
                    FileSystem.DeleteFile(filename, UIOption.OnlyErrorDialogs, RecycleOption.SendToRecycleBin);
                }
            }
            SpaceEngineersCore.ManageDeleteVoxelList.Clear();

            IsModified = false;
            IsBusy = false;
        }