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HttpListenerResponse.AppendHeader Method

Appends a value to the specified HTTP header to be sent with this response.

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

public void AppendHeader(
	string name,
	string value
)

Parameters

name
Type: System.String
The name of the HTTP header to append value to.
value
Type: System.String
The value to append to the name header.

ExceptionCondition
ArgumentException

name is null or an empty string ("").

-or-

You are not allowed to specify a value for the specified header.

-or-

name or value contains invalid characters.

ArgumentOutOfRangeException

The length of value is greater than 65,535 characters.

Calling this method is equivalent to calling the Add method on the collection returned by the Headers property.

If the header specified in header does not exist, this method inserts a new header into the Headers property's collection. If header is present in the collection, this method adds value to the existing values. To replace the value of an existing header, use the AddHeader method.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.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.

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