获取任意可序列化对象的Xml字符串，方便在日志中查看任一所感兴趣的对象。

代码：

public static string GetLoggingString(this object obj)
{
    using (var stream = new MemoryStream())
    {
        new XmlSerializer(obj.GetType()).Serialize(stream, obj);
        stream.Position = 0;
        var buffer = new byte[stream.Length];
        stream.ReadAsync(buffer, 0, buffer.Length);
        stream.FlushAsync();
        return Encoding.UTF8.GetString(buffer);
    }
} 

用法：

var list = new List<string> { "abs", "sdf", "srer" };
var d = list.GetLoggingString();

结果：

<?xml version="1.0"?>
<ArrayOfString xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <string>abs</string>
  <string>sdf</string>
  <string>srer</string>
</ArrayOfString>