How do I set the timelimit for a cache before it expires.

Currently my cache is handled by using HttpContext.Current.Cache[<keyname>] = object;

Using this method I cant see to add a time limit of expiration. How do I do this?

Previously I had used HttpContext.Current.Cache.Insert(<keyname>, object, null, DateTime.Now.AddMinutes(30), TimeSpan.Zero);

but that never worked, my object never got cached. I am using asp.net 2.0

Thanks

 try using  Cache.Add(<keyname>, object, null, System.Web.Caching.Cache.NoAbsoluteExpiration, new TimeSpan(0, 30, 0), System.Web.Caching.CacheItemPriority.Default, null);

 NoAbsoluteExpiration and TimeSpan attributes tell how and when the Cache should expire.

 You can also use SlidingExpiration instead of Absolute.

Try this: 

Response.Cache.SetExpires(DateTime.Now.AddSeconds(60));

Refer below article:

http://msdn.microsoft.com/en-us/kb/kb00323290.aspx

use this

Response.Cache.SetExpires(DateTime.Now.AddMinutes(60));