readonly in asp.net mvc

How do I make a textbox read only in mvc? I have included the following snippet, but it`s not working.

 <%=Html.Textbox("test", "test", new { style开发者_运维问答="border: 0px; width:280px" ;readonly=true}%>

<%=Html.Textbox("test", "test", new { style="border: 0px; width:280px", @readonly =  "readonly"}%>