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Cookie Constructor (String, String)

Initializes a new instance of the Cookie class with a specified Name and Value.

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

public Cookie(
	string name,
	string value


Type: System.String
The name of a Cookie. The following characters must not be used inside name: equal sign, semicolon, comma, newline (\n), return (\r), tab (\t), and space character. The dollar sign character ("$") cannot be the first character.
Type: System.String
The value of a Cookie. The following characters must not be used inside value: semicolon, comma.


The name parameter is null.


The name parameter is of zero length.


The name parameter contains an invalid character.


The value parameter is null .

-or -

The value parameter contains a string not enclosed in quotes that contains an invalid character.

The default for the value parameter uses the empty string ("").

The value parameter for a Cookie must not be a null reference (Nothing in Visual Basic). The following characters are reserved and cannot be passed in the value parameter unless the string passed in the value parameter is enclosed in double quotes: semicolon, comma. So the following example constructor would succeed but when you try to add this Cookie to a CookieContainer instance with the Add or Add methods the operation will fail and throw an exception:

System.Net.Cookie cookie = new System.Net.Cookie("contoso", "123,456", "");

However, the following constructor with these special characters escaped will create a Cookie that can be added to a CookieContainer instance:

System.Net.Cookie cookie = new System.Net.Cookie("contoso", "\"123,456\"");

The comma character is used as a delimiter between separate cookies on the same line.

.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

Portable Class Library

Supported in: Portable Class Library

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.