set text box hidden by default

http://stackoverflow.com/questions/8800446/how-can-i-set-textboxfor-to-be-hidden-by-default

Not sure what you mean by default, but you could add the style attribute:

<%= Html.TextBoxFor(m => m.SomeProperty, new { style = "display: none;" }) %>

or:

<%= Html.TextBoxFor(m => m.SomeProperty, new { @class = "hidden" }) %>

and in your CSS file:

.hidden {
    display: none;
}