Build Style item not exist in context menu in creating CSS file in Visual Studio 2013?

Question

I want to create a CSS file in Visual Studio 2013. but Build Style item not exist in context menu. how to get it?

my toolbar:

Solution

The Style Builder dialog (aka New Style wizard) is deprecated. It still exists in the WebForms editor (under Format -> New Style, but only after you've loaded design view), but not in the new HTML and CSS editors.

The reason for this is because the dialog depends on the (also deprecated) HTML Designer, and because it is very out of date. Instead, you should consider writing your styles in the CSS editor, which has some better features (such as supporting CSS3, vendor prefixes, snippets, color picker, and several other editing improvements).