Question

What is the difference between HttpRuntime.Cache and HttpContext.Current.Cache?

Answer 1

I find following detail from http://theengineroom.provoke.co.nz/archive/2007/04/27/caching-using-httpruntime-cache.aspx

For caching I looked into using
HttpContext.Current.Cache but after
reading other blogs I found that
caching using HttpContext uses
HttpRuntime.Cache to do the actual
caching. The advantage of using
HttpRuntime directly is that it is
always available, for example, in
Console applications and in Unit
tests.

Using HttpRuntime.Cache is simple.
Objects can be stored in the cache and
are indexed by a string. Along with a
key and the object to cache the other
important parameter is the expiry
time. This parameter sets the time
before the object is dropped from the
cache.

Here is good link for you.

Another good resource.