C#写入对象或者集合类型数据到xml文件的代码

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public static string SerializeToXmlString(object objectToSerialize) {
    MemoryStream memoryStream = new MemoryStream();
    System.Xml.Serialization.XmlSerializer xmlSerializer = 
        new System.Xml.Serialization.XmlSerializer(objectToSerialize.GetType());
    xmlSerializer.Serialize(memoryStream, objectToSerialize);
    ASCIIEncoding ascii = new ASCIIEncoding();
    return ascii.GetString(memoryStream.ToArray());
}