Replace built-in helpers

[cloudfy]

How to replace built-in block helpers ex. #if. Tried the following:

  var config = new HandlebarsConfiguration()
  {
  };
  config.BlockHelpers.AddOrReplace("if", new IfHelper());
 
  _handlebars = Handlebars.Create(config);
  _handlebars.Configuration.BlockHelpers.AddOrReplace("if", new IfHelper());

does not work as it seems the default handler factory is loaded later and not respecting this.