public void Remove()
        {
            HttpQueryString query = new HttpQueryString {
                { "rød", "grød" }
            };

            Assert.AreEqual(1, query.Count);
            Assert.AreEqual("grød", query["rød"]);

            query.Remove("rød");

            Assert.AreEqual(0, query.Count);
            Assert.AreEqual(null, query["rød"]);
        }