Deserializing XML into C# class member without nesting tags

I have some xml that looks likes this:

<data>
    <typeadatas>
        <typea>
            <name>Some data of type a</name>
            <!-- Other tags -->
        </typea>
        <!-- And more type a data -->
    </typeadatas>
    <arrays>
        <typea>
            <name>Array of data using a type a</name>
            <!-- Other tags from above -->
            <dimension1>
                <!-- tags informing about the dimension -->
            </dimension1>
         </typea>
     </arrays>
</data>

And I need to get this into a series of C# classes to be able to do further processing. Currently I have a series of classes that look like:

class Data : IXmlSerializable {
    /* Custom implementation of ReadXml to handle various complications in the xml not shown here */
    List<TypeA> TypeAData
    List<ArrayType<TypeA>> TypeADataInArrays
}

class BaseType {
    public string Name;
    /* Other properties */
}

class TypeA : BaseType {
}

class Dimension {
    /* Dimension properties */
}

class ArrayType<T> where T : BaseType {
    T BaseData
    Dimension Dimension1;
}

There exists further data types that are stored, but share (for now) the same set of data as typea does. Thus BaseType is used to store all the common elements. I don't want to rely on this always being true though.

For the array information, they store data about a separate piece of data (So the typea tags are independent in the example given), but I still want to reuse the common data inside a common class for arrays for dealing with dimensions and the like. However, in the given classes, the BaseData member never receives data from the XML deserialization process as C# expects it to be inside another tag. However, I don't want to have another tag there, as it just makes the XML harder to understand.

Thus, besides making a custom ReadXml function for ArrayType, is there a way to have C# automatically the tags from within the typea array into BaseData, without having a tag?