Tips: Clean Session/Cache (4/21/2009 updated)

Clean Session:

Session.Clear();

Totally remove the Session:

Session.Abandon();

Clean Cache:

HttpRuntime.Close();

Note: Be careful when using this way to clear the cache (See here). I found a better way to do the same thing from here.

List cacheKeys = new List();
IDictionaryEnumerator cacheEnum = Cache.GetEnumerator();
while (cacheEnum.MoveNext())
{
    cacheKeys.Add(cacheEnum.Key.ToString());
}
foreach (string cacheKey in cacheKeys)
{
    Cache.Remove(cacheKey);
}

Reference: What is the best way to end session?