update and save xml files c#

Question

hello,

I need to update my xml document from textboxes in my project.but if i don't write any data one of the textboxes, i want  there is no changing in xml node.(old data must be prevent but in my project node is empty,there is no data !!!) 

Answer 1

can you provide more details about your probject please? ideally post minimal but complete code here so that we can get a better idea about what you want.