WCF/WF - wcf caching

Does anyone have any idea how to implement caching in WCF like in the old ASMX?
All I had to do in ASMX was:
[System.Web.Services.WebMethod(CacheDuration = 1800)]

use the WebCache attribute on your interface. An example:

[WebCache(Location = OutputCacheLocation.ServerAndClient, SqlDependency = "myDatabase:Products", VaryByParam = "categoryId")]

The above example uses a SqlDependency but it is not required.

The WebCache attribute causes WCF to integrate with the ASP.NET caching system.  It applies standard HTTP caching behavior such as the use of the cache-control and expires headers.   This is only available in the WCF REST starter kit.

You can also use ChannelFactory caching in non-REST services. See here for details:

http://blogs.msdn.com/b/wenlong/archive/2007/10/27/performance-improvement-of-wcf-client-proxy-creation-and-best-practices.aspx

thanks for your response. where can I find this class, WebCacheAttribute? do i have to reference an assembly, because when I try to use this attribute, intellisense recommends me to generate a class, WebCache.

As i mentioned, it is in the WCF REST Starter Kit.

http://www.asp.net/downloads/starter-kits/wcf-rest