XmlWriter - 编写xsi：nil = true属性

I have an issue with an InfoPath 2010 form, that has some code behind it. The purpose of my form is to collect data from a user, and using the answers provided, auto populate a number of required tasks. These tasks are populated in a repeating section on the form. My code behind contains the logic to auto populate each entry in the repeating section. I am using the XMLWriter class, and WriteStringElement methods to populate each of the fields in the repeating section.I have an issue with an InfoPath 2010 form, tha