Encryption of an XML document?

Question

C++ / C#

Hello, let's get straight to the point.
I have a dataGridView in which data (*.xml) is saved by buttons, I want to implement encryption of this data
I will be glad if you help

Code snippet:

Answer 1

Also, if necessary, there is a class code (MyClass)

Answer 2

We received the text of our xml, asked the user for a password, encrypted it.
https://docs.microsoft.com/ru-ru/dotnet/api/system...