Code writing using Xml

[rose4you]

This may seem an odd question but hear me out. I was looking through the files of the NeoAxis engine when I found an xml file that had what appeared to be lines of code stored in strings.Due to the engine being closed source I cannot see how it works but to all experienced devs out there, how is this possibly working?If the XML was loaded into the code the string would be stored as a string. But is there any way, in a language such as c++ or c# to use string as statements in a program? I dont know if Im allowed to show you this XML file but the statements were prefixed with a letter and a colon. Like this: \[code\]"M:Class.DoSomething();".\[/code\]If I can get some idea of how this is done it would be very useful for alot of things