public bool CanUpgrade {get;}

//Pass in the full path to the style file on disk
public async Task<bool> CanUpgradeStyleAsync(string stylePath)
{
  //Add the style to the current project
  await QueuedTask.Run(() => StyleHelper.AddStyle(Project.Current, stylePath));
  StyleProjectItem style = Project.Current.GetItems<StyleProjectItem>().First(x => x.Path == stylePath);

  //returns true if style can be upgraded
  return style.CanUpgrade;
}

//Pass in the full path to the style file on disk
public async Task<bool> UpgradeStyleAsync(string stylePath)
{
  bool success = false;

  //Add the style to the current project
  await QueuedTask.Run(() => StyleHelper.AddStyle(Project.Current, stylePath));
  StyleProjectItem style = Project.Current.GetItems<StyleProjectItem>().First(x => x.Path == stylePath);

  //Verify that style can be upgraded
  if (style.CanUpgrade)
  {
    success = await QueuedTask.Run(() => StyleHelper.UpgradeStyle(style));
  }
  //return true if style was upgraded
  return success;
}