Deletes an object from cache given cache key, a delete time, and an optional hashcode. The item is immediately made non retrievable.
Keep in mind: add(string, object) and replace(string, object) will fail when used with the same key will fail, until the server reaches the specified time. However, set(string, object) will succeed and the new value will not be deleted.

public bool Delete(
	string key,
	DateTime expiry
)

Public Function Delete ( 
	key As String,
	expiry As DateTime
) As Boolean

public:
bool Delete(
	String^ key, 
	DateTime expiry
)

member Delete : 
        key : string * 
        expiry : DateTime -> bool