Cannot set class on form using Html.BeginUmbracoForm in MVC

Questions
1

So I'm trying to add a class to the form element and the form is generated using the following code:

@using(Html.BeginUmbracoForm<SearchFormSurfaceController>("HandleSearchForm"))

I've tried doing the following: 

@using(Html.BeginUmbracoForm<SearchFormSurfaceController>("HandleSearchForm", new { @class = "myclass" }))

This doesn't throw any errors however doesn't add a class to the form element.

To add a class to a label for example is easy: 

@Html.LabelFor(model => model.Weight, new { @class = "myclass" })

Thanks.

 

This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/43492-cannot-set-class-on-form-using-htmlbeginumbracoform-in-mvc