CachedPartial with contextualKeyBuilder

gistfile1.cs

@Html.CachedPartial(
    //partial view name
    "myPartialView", 
    //the model to pass the view - this will be the same object passed to the contextualKeyBuilder delegate
    Model, 
    //seconds to cache
    123,
    //the key builder delegate, accepts the model passed in to the cached partial and the current
    // viewdata dictionary of the partial view
    contextualKeyBuilder: (model, viewdata) =>
        "some key, you can use the model and viewdata data to build the key if you want")