[c#] Serialize Property as Xml Attribute in Element

I have the following class:

[Serializable]
public class SomeModel
{
    [XmlElement("SomeStringElementName")]
    public string SomeString { get; set; }

    [XmlElement("SomeInfoElementName")]
    public int SomeInfo { get; set; }
}

Which (when populated with some test data) and Serialized using XmlSerializer.Serialize() results in the following XML:

<SomeModel>
  <SomeStringElementName>testData</SomeStringElementName>
  <SomeInfoElementName>5</SomeInfoElementName>
</SomeModel>

What I need to have is:

<SomeModel>
  <SomeStringElementName Value="testData" />
  <SomeInfoElementName Value="5" />
</SomeModel>

Is there a way to specify this as attributes without writing my own custom serialization code?

Kind of, use the XmlAttribute instead of XmlElement, but it won't look like what you want. It will look like the following:

<SomeModel SomeStringElementName="testData"> 
</SomeModel> 

The only way I can think of to achieve what you want (natively) would be to have properties pointing to objects named SomeStringElementName and SomeInfoElementName where the class contained a single getter named "value". You could take this one step further and use DataContractSerializer so that the wrapper classes can be private. XmlSerializer won't read private properties.

// TODO: make the class generic so that an int or string can be used.
[Serializable]  
public class SerializationClass
{
    public SerializationClass(string value)
    {
        this.Value = value;
    }

    [XmlAttribute("value")]
    public string Value { get; }
}


[Serializable]                     
public class SomeModel                     
{                     
    [XmlIgnore]                     
    public string SomeString { get; set; }                     

    [XmlIgnore]                      
    public int SomeInfo { get; set; }  

    [XmlElement]
    public SerializationClass SomeStringElementName
    {
        get { return new SerializationClass(this.SomeString); }
    }               
}