public XMLKeyValueTypeHandler(Type type) : base(type)
{
PropertyInfo keyProperty = Type.GetProperty("Key");
_keyHandler = new Lazy <XMLFieldHandler>(() => XMLHelpers.ResolveFieldHandler(keyProperty.PropertyType, new XMLReflectionHandler(keyProperty)));
PropertyInfo valueProperty = Type.GetProperty("Value");
_valueHandler = new Lazy <XMLFieldHandler>(() => XMLHelpers.ResolveFieldHandler(valueProperty.PropertyType, new XMLReflectionHandler(valueProperty)));
Type opaqueKeyType = XMLHelpers.GetOpaqueType(keyProperty.PropertyType, out bool opaque);
_keyDefault = opaque && opaqueKeyType.IsValueType ? Activator.CreateInstance(opaqueKeyType) : null;
Type opaqueValueType = XMLHelpers.GetOpaqueType(valueProperty.PropertyType, out opaque);
_valueDefault = opaque && opaqueValueType.IsValueType ? Activator.CreateInstance(opaqueValueType) : null;
}