Gets or sets the value of a header. In the case of Gets, the value of the first header of that name is returned. If the header does not exist, returns null. In the case of Sets, the value of the first header of that name is updated. If the header does not exist, it is added.

public string this[
	string HeaderName
] { get; set; }

Public Default Property Item ( 
	HeaderName As String
) As String
	Get
	Set

public:
property String^ default[String^ HeaderName] {
	String^ get (String^ HeaderName);
	void set (String^ HeaderName, String^ value);
}