Today's learning point from StackOverflow:
Whilst it's clear that using output caching is a Good Thing, it can be a little counter-productive sometimes if a user changes some detail that invalidates the cached version of the page e.g. changing the price of a product, adding a new comment to a blog post. But as I've now discovered you can programmatically remove the cached version of the page by calling this static method on the Response stream:
Call HttpResponse.RemoveOutputCacheItem(myCachedUrl)
Looking it up on MSDN I discovered that this method has been present since .NET 1.1 and I've never come across it before!
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