Map DataRow to nested object

map.cs

private CreateItem<T>(DataRow row)
	where T : new()
{
	T item  = new T();
	
	foreach (PropertyInfo property in typeof(T).GetProperties())
	{
		MapFromDataRow(row, "", property, item);
	}
	return item;
}

private void MapFromDataRow(DataRow row, string prefix, PropertyInfo property, object obj)
{
	string columnName = string.IsNullOrEmpty(prefix) ? prefix : prefix + "_" + property.Name;
	
	if (property.PropertyType.IsValueType)
	{
		object value = row[columnName];
		property.SetValue(object, value);
		return;
	}
		
	object childObj = Activator.CreateInstance(property.PropertyType);
	property.SetValue(object, childObj);
	
	foreach (PropertyInfo childProperty in property.PropertyType.GetProperties())
	{
		MapFromDataRow(row, columnName, childProperty, childObj);
	}
}