How special characters are handled in Webconfig and AppConfig

A string (such as ABCE&EFG) with special characters & in the configuration file will cause an error. The error is as follows:

How to deal with it?

The nature of the config file is XML, so it must conform to the XML specification we need to deal with:

ABCE&EFG Change to ABCE&EFG & Replace with &

After the above treatment, the error is avoided. Special characters that may also appear in config (or XML) are:

"Quotation marks: "
' Apostrophe: '
&: &
<:&lt;
>:&gt;

correspond to the corresponding character of the processing is possible.

Pay special attention to the:&amp;; (semicolon) is one with the front. Other substitutions are the same, where the principle is to study the specification of XML.

How special characters are handled in Webconfig and AppConfig