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CookieContainer.Add Method (Cookie)

Adds a Cookie to a CookieContainer. This method uses the domain from the Cookie to determine which domain collection to associate the Cookie with.

Namespace:  System.Net
Assembly:  System (in System.dll)

public void Add(
	Cookie cookie


Type: System.Net.Cookie
The Cookie to be added to the CookieContainer.


cookie is null.


The domain for cookie is null or the empty string ("").


cookie is larger than maxCookieSize.


the domain for cookie is not a valid URI.

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.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.