How to use double quotes in app.config

Question

I need to put double quotes in configuration property Property1

Answer 1

I believe the proper way to encode quotes in XML is via "

See this answer: How do I escape double quotes in attributes in an XML String in T-SQL?

The same would go for any other 'special' characters you wish to include as data. Essentially, you should use the same encoding you would use in HTML attributes.