T deserialize(String s)
{
    XmlSerializer xml = new XmlSerializer(typeof(T));
    byte[] buf = Encoding.UTF8.GetBytes(s);
    MemoryStream ms = new MemoryStream(buf);
    T obj=(T)xml.Deserialize(ms);
    return obj;
}
把字符串s反序列化成Weather对象， 那么正确的调用方法是：
A、Weather w=deserialize(s);
B、Weather w=deserialize(s);
C、
 Weather w=(Weather)deserialize(s);
D、
都不