What exactly is Reflection and when is it a good approach?

Question

What exactly is Reflection? I read the Wikipedia article on this subject and I understand that it is a kind of meta-programming, where the program can modify itself at run-

Answer 1

Another example: I have code that I use that takes the output of a database - which is a set of rows with named columns - and feeds it into an array of objects. I iterate through the rows, and if the target object has a property with the same name and type, I set it. This makes for my data-getting code just looking something like this:

SqlDataReader sdr = Helper.GetReader("GetClientByID", ClientID);
Client c = new Client();
FillObject(sdr, c);
return c;