Removing specific items from Cache (ASP.NET)

Question

I am adding a bunch of items to the ASP.NET cache with a specific prefix. I\'d like to be able to iterate over the cache and remove those items.

The way I\'ve tried to d

Answer 1

You can't remove items from a collection whilst you are iterating over it so you need to do something like this:

List itemsToRemove = new List();

IDictionaryEnumerator enumerator = Cache.GetEnumerator();
while (enumerator.MoveNext())
{
    if (enumerator.Key.ToString().ToLower().StartsWith(prefix))
    {
        itemsToRemove.Add(enumerator.Key.ToString());
    }
}

foreach (string itemToRemove in itemsToRemove)
{
    Cache.Remove(itemToRemove);
}

This approach is fine and is quicker and easier than cache dependencies.