c# webdriver - how can I verify 'disabled' attribute exists for a button -

i'm trying verify button loacted within test page has 'disabled' attribute applied it. here code:

<button type="button" class="btn-1" data-type="plus" data-field="quantity" disabled="disabled">

how go getting handle on 'disabled' attribute?

many help

i not using c# think can use getattribute() method webdriver api.

so should that:

iwebelement button = locator button; button.getattribute("disabled");

and can assert value etc.

UIO