Determines if the Headers collection contains a header of the specified name, and sHeaderValue=Header's value. Similar to a case-insensitive version of: headers[sHeaderName]==sHeaderValue, although it checks all instances of the named header.

public bool ExistsAndEquals(
	string sHeaderName,
	string sHeaderValue
)

Public Function ExistsAndEquals ( 
	sHeaderName As String,
	sHeaderValue As String
) As Boolean

public:
bool ExistsAndEquals(
	String^ sHeaderName, 
	String^ sHeaderValue
)