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WebHeaderCollection.Add Method (HttpRequestHeader, String)

Inserts the specified header with the specified value into the collection.

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

public void Add(
	HttpRequestHeader header,
	string value
)

Parameters

header
Type: System.Net.HttpRequestHeader

The header to add to the collection.

value
Type: System.String

The content of the header.

ExceptionCondition
ArgumentOutOfRangeException

The length of value is greater than 65535.

InvalidOperationException

This WebHeaderCollection instance does not allow instances of HttpRequestHeader.

If the specified header does not exist, the Add method inserts a new header into the list of header name/value pairs.

If the specified header is already present, value is added to the comma-separated list of values associated with the header.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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