public void Can_Add_Additional_Values()
{
const string SOME_FIELD = "Authorization";
var header = new HttpHeader(SOME_FIELD, "OAuth realm=\"http://photos.example.net/photos\"");
header.AddValue("oauth_consumer_key=\"dpf43f3p2l4k3l03\"");
Assert.That(header.Value, Is.EqualTo("OAuth realm=\"http://photos.example.net/photos\", oauth_consumer_key=\"dpf43f3p2l4k3l03\""));
}