var result = await "https://query.yahooapis.com/v1/public/yql"
        .SetQueryParam("q", "select wind from weather.forecast where woeid=2460286")
        .SetQueryParam("format", "xml")
        .GetXDocumentAsync();

    string chill = result
        ?.Element("query")
        ?.Element("results")
        ?.Element("channel")
        ?.Element(XNamespace.Get("http://xml.weather.yahoo.com/ns/rss/1.0") + "wind")
        ?.Attribute("chill")
        ?.Value;

    var result = await "http://my_xml_endpoint"
        .PostXmlAsync(new TestModel { Number = 3, Text = "Test" })
        .ReceiveXml<TestModel>();

    Assert.AreEqual(3, result.Number);
    Assert.AreEqual("Test", result.Text);

    var result = await "http://my_xml_endpoint"
        .PutXmlAsync(new TestModel {Number = 3, Text = "Test"})
        .ReceiveXDocument();

    Assert.AreEqual("3", result?.Element("TestModel")?.Element("Number")?.Value);
    Assert.AreEqual("Test", result?.Element("TestModel")?.Element("Text")?.Value);