Serializing Name/Value Pairs in a Custom Object via Web Service

[Serializable]
public class StorageObject {
  public string Name { get; set; }
  public string Birthday { get; set; }
  public List<NameValuePairs> OtherInfo { get; set; }
}
[Serializable]
public class NameValuePairs {
  public string Name { get; set; }
  public string Value { get; set; }
}

[WebMethod]
    public List<StorageObject> GetStorageObjects() {
      List<StorageObject> o = new List<StorageObject>() {
        new StorageObject() {
          Name = "Matthew",
          Birthday = "Jan 1st, 2008",
          OtherInfo = new List<NameValuePairs>() {
            new NameValuePairs() { Name = "Hobbies", Value = "Programming" },
            new NameValuePairs() { Name = "Website", Value = "Stackoverflow.com" }
          }
        },
        new StorageObject() {
          Name = "Joe",
          Birthday = "Jan 10th, 2008",
          OtherInfo = new List<NameValuePairs>() {
            new NameValuePairs() { Name = "Hobbies", Value = "Programming" },
            new NameValuePairs() { Name = "Website", Value = "Stackoverflow.com" }
          }
        }
      };

      return o;
    }

<StorageObject>
    <Name>Matthew</Name>
    <Birthday>Jan 1st, 2008</Birthday>
    <OtherInfo>
    	<NameValuePairs>
    		<Name>Hobbies</Name>
    		<Value>Programming</Value>
    	</NameValuePairs>
    	<NameValuePairs>
    		<Name>Website</Name>
    		<Value>Stackoverflow.com</Value>
    	</NameValuePairs>
    </OtherInfo>
</StorageObject>

<OtherInfo>
    <Hobbies>Programming</Hobbies>
    <Website>Stackoverflow.com</Website>
</OtherInfo>

In PHP => "$Result["StorageObject"]["OtherInfo"]["Hobbies"]".

In C# => var m = ServiceResult[0].OtherInfo["Hobbies"];

public class OtherInfo {
  public string Hobbies { get; set; }
  public string FavoriteWebsite { get; set; }
}

public class StorageObject {
  public string Name { get; set; }
  public string Birthday { get; set; }
  public List<string> OtherInfo { get; set; }
}

OtherInfo = {"Hobbies|Programming", "Website|Stackoverflow.com"}

<StorageObject>
    <Name>Matthew</Name>
    <Birthday>Jan 1st, 2008</Birthday>
    <OtherInfo>
        <string>Hobbies|Programming</string>
        <string>Website|Stackoverflow.com</string>
    </OtherInfo>
</StorageObject>

public class StorageObject {
  public string Name { get; set; }
  public string Birthday { get; set; }
  public XElement OtherInfo { get; set; } // XmlElement for dot net 2
}

XElement OtherInfo = new XElement("OtherInfo");
OtherInfo.Add( ..Hobbies xelement & text value..);
OtherInfo.Add( ..WebSite xelement & text value..);

<OtherInfo>
    <Hobbies>Programming</Hobbies>
    <Website>Stackoverflow.com</Website>
</OtherInfo>

XElement OtherInfo = new XElement("OtherInfo");
OtherInfo.Add( ..nvp xattribute Hobbies & value..);
OtherInfo.Add( ..nvp xattribute WebSite & value..);

<OtherInfo>
    <nvp n="Hobbies" v="Programming" />
    <nvp n="Website" v="Stackoverflow.com" />
</OtherInfo>

public class StorageObject {
  public string Name { get; set; }
  public string Birthday { get; set; }
  [XmlAnyElement("Info")]  // this prevents double-nodes in the XML
  public XElement OtherInfo { get; set; }
}

StorageObject o = new StorageObject();
o.OtherInfo.Add(new XElement("Hobbies","Programming");
o.OtherInfo.Add(new XElement("Website","Stackoverflow.com");

<Info>
  <Hobbies>Programming</Hobbies>
  <Website>Stackoverflow.com</Website>
</Info>

[Serializable]
public class StorageObject {
  public string Name { get; set; }
  public string Birthday { get; set; }

  [Nonserializable]
  public Dictionary<string,List<string>> OtherInfo { get; set; }
}

[WebMethod]
public List<StorageObject> GetStorageObjects() {
    // returns list of storage objects from persistent storage or cache
}

[WebMethod]
public List<string> GetStorageObjectAttributes( string name )
{
    // find storage object, sObj
    return sObj.Keys.ToList();
}

[WebMethod]
public List<string> GetStorageObjectAtributeValues( sting name, string attribute )
{
    // find storage object, sObj
    return sObj[attribute];
}

List<string> hobbies = storageObject.OtherInfo["Hobbies"];