CookieContainer.Add Method (Cookie)
Assembly: System (in System.dll)
If the Count property equals or exceeds the Capacity property, one or more Cookie instances are removed from the container before adding the cookie parameter. Enough Cookie instances are removed to bring Count below Capacity as follows: if there are expired instances in the given scope, they are cleaned up. If not, then the least recently used CookieCollection is found and removed from the container.