序列化和反序列化XML/JSON (SerializationHelper.cs):

using Newtonsoft.Json;
using System.IO;
using System.Xml.Serialization;

namespace MyProject.Helpers
{
    public static class SerializationHelper
    {
        public static T DeserializeXml<T>(this string toDeserialize)
        {
            XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));
            using (StringReader textReader = new StringReader(toDeserialize))
            {
                return (T)xmlSerializer.Deserialize(textReader);
            }
        }

        public static string SerializeXml<T>(this T toSerialize)
        {
            XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));
            using (StringWriter textWriter = new StringWriter())
            {
                xmlSerializer.Serialize(textWriter, toSerialize);
                return textWriter.ToString();
            }
        }

        public static T DeserializeJson<T>(this string toDeserialize)
        {
            return JsonConvert.DeserializeObject<T>(toDeserialize);
        }

        public static string SerializeJson<T>(this T toSerialize)
        {
            return JsonConvert.SerializeObject(toSerialize);
        }
    }
}

我觉得我需要分享这个被操纵的代码到公认的答案-因为我没有声誉，我无法评论。

using System;
using System.Xml.Serialization;
using System.IO;

namespace ObjectSerialization
{
    public static class ObjectSerialization
    {
        // THIS: (C): https://stackoverflow.com/questions/2434534/serialize-an-object-to-string
        /// <summary>
        /// A helper to serialize an object to a string containing XML data of the object.
        /// </summary>
        /// <typeparam name="T">An object to serialize to a XML data string.</typeparam>
        /// <param name="toSerialize">A helper method for any type of object to be serialized to a XML data string.</param>
        /// <returns>A string containing XML data of the object.</returns>
        public static string SerializeObject<T>(this T toSerialize)
        {
            // create an instance of a XmlSerializer class with the typeof(T)..
            XmlSerializer xmlSerializer = new XmlSerializer(toSerialize.GetType());

            // using is necessary with classes which implement the IDisposable interface..
            using (StringWriter stringWriter = new StringWriter())
            {
                // serialize a class to a StringWriter class instance..
                xmlSerializer.Serialize(stringWriter, toSerialize); // a base class of the StringWriter instance is TextWriter..
                return stringWriter.ToString(); // return the value..
            }
        }

        // THIS: (C): VPKSoft, 2018, https://www.vpksoft.net
        /// <summary>
        /// Deserializes an object which is saved to an XML data string. If the object has no instance a new object will be constructed if possible.
        /// <note type="note">An exception will occur if a null reference is called an no valid constructor of the class is available.</note>
        /// </summary>
        /// <typeparam name="T">An object to deserialize from a XML data string.</typeparam>
        /// <param name="toDeserialize">An object of which XML data to deserialize. If the object is null a a default constructor is called.</param>
        /// <param name="xmlData">A string containing a serialized XML data do deserialize.</param>
        /// <returns>An object which is deserialized from the XML data string.</returns>
        public static T DeserializeObject<T>(this T toDeserialize, string xmlData)
        {
            // if a null instance of an object called this try to create a "default" instance for it with typeof(T),
            // this will throw an exception no useful constructor is found..
            object voidInstance = toDeserialize == null ? Activator.CreateInstance(typeof(T)) : toDeserialize;

            // create an instance of a XmlSerializer class with the typeof(T)..
            XmlSerializer xmlSerializer = new XmlSerializer(voidInstance.GetType());

            // construct a StringReader class instance of the given xmlData parameter to be deserialized by the XmlSerializer class instance..
            using (StringReader stringReader = new StringReader(xmlData))
            {
                // return the "new" object deserialized via the XmlSerializer class instance..
                return (T)xmlSerializer.Deserialize(stringReader);
            }
        }

        // THIS: (C): VPKSoft, 2018, https://www.vpksoft.net
        /// <summary>
        /// Deserializes an object which is saved to an XML data string.
        /// </summary>
        /// <param name="toDeserialize">A type of an object of which XML data to deserialize.</param>
        /// <param name="xmlData">A string containing a serialized XML data do deserialize.</param>
        /// <returns>An object which is deserialized from the XML data string.</returns>
        public static object DeserializeObject(Type toDeserialize, string xmlData)
        {
            // create an instance of a XmlSerializer class with the given type toDeserialize..
            XmlSerializer xmlSerializer = new XmlSerializer(toDeserialize);

            // construct a StringReader class instance of the given xmlData parameter to be deserialized by the XmlSerializer class instance..
            using (StringReader stringReader = new StringReader(xmlData))
            {
                // return the "new" object deserialized via the XmlSerializer class instance..
                return xmlSerializer.Deserialize(stringReader);
            }
        }
    }
}

使用StringWriter而不是StreamWriter:

public static string SerializeObject<T>(this T toSerialize)
{
    XmlSerializer xmlSerializer = new XmlSerializer(toSerialize.GetType());

    using(StringWriter textWriter = new StringWriter())
    {
        xmlSerializer.Serialize(textWriter, toSerialize);
        return textWriter.ToString();
    }
}

Note, it is important to use toSerialize.GetType() instead of typeof(T) in XmlSerializer constructor: if you use the first one the code covers all possible subclasses of T (which are valid for the method), while using the latter one will fail when passing a type derived from T.    Here is a link with some example code that motivate this statement, with XmlSerializer throwing an Exception when typeof(T) is used, because you pass an instance of a derived type to a method that calls SerializeObject that is defined in the derived type's base class: http://ideone.com/1Z5J1.

此外，Ideone使用Mono来执行代码;使用Microsoft . net运行时得到的实际异常与Ideone上显示的异常有不同的消息，但它同样失败。

在极少数情况下，您可能希望实现自己的String序列化。

但这可能是个坏主意，除非你知道自己在做什么。(例如用批处理文件序列化I/O)

类似这样的方法就可以达到目的(而且手动/批处理编辑也很容易)，但是要注意应该做更多的检查，比如名称不包含换行符。

public string name {get;set;}
public int age {get;set;}

Person(string serializedPerson) 
{
    string[] tmpArray = serializedPerson.Split('\n');
    if(tmpArray.Length>2 && tmpArray[0].Equals("#")){
        this.name=tmpArray[1];
        this.age=int.TryParse(tmpArray[2]);
    }else{
        throw new ArgumentException("Not a valid serialization of a person");
    }
}

public string SerializeToString()
{
    return "#\n" +
           name + "\n" + 
           age;
}

public static string SerializeObject<T>(T objectToSerialize)
        {
            System.Runtime.Serialization.Formatters.Binary.BinaryFormatter bf = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
            MemoryStream memStr = new MemoryStream();

            try
            {
                bf.Serialize(memStr, objectToSerialize);
                memStr.Position = 0;

                return Convert.ToBase64String(memStr.ToArray());
            }
            finally
            {
                memStr.Close();
            }
        }

        public static T DerializeObject<T>(string objectToDerialize)
        {
            System.Runtime.Serialization.Formatters.Binary.BinaryFormatter bf = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
            byte[] byteArray = Convert.FromBase64String(objectToDerialize);
            MemoryStream memStr = new MemoryStream(byteArray);

            try
            {
                return (T)bf.Deserialize(memStr);
            }
            finally
            {
                memStr.Close();
            }
        }

我知道这不是问题的真正答案，但根据问题的投票数和接受的答案，我怀疑人们实际上是在使用代码将对象序列化为字符串。

使用XML序列化会给输出增加不必要的额外文本垃圾。

对于下面的类

public class UserData
{
    public int UserId { get; set; }
}

它生成

<?xml version="1.0" encoding="utf-16"?>
<UserData xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <UserId>0</UserId>
</UserData>

更好的解决方案是使用JSON序列化(最好的方法之一是Json.NET)。 序列化一个对象:

var userData = new UserData {UserId = 0};
var userDataString = JsonConvert.SerializeObject(userData);

反序列化一个对象:

var userData = JsonConvert.DeserializeObject<UserData>(userDataString);

序列化的JSON字符串看起来像这样:

{"UserId":0}