Minor issues with creating classes during runtime

You want to create a Class Based on the string during runtime and implement it using reflection.

If (type. GetType ("DW _" + key) = NULL)
Console. writeline ("<-- error: the corresponding data processing class DW _" + key is not found );

Datawrapbase DW = (datawrapbase) system. activator. createinstance (type. GetType ("DW _" + key ));

During debugging, a problem is found, that is, if there is an error in the constructorCodeError cannot be tracked. Therefore, put the main code into other functions and construct the object before calling it. The code may be a bit ugly, but it can report errors and debug, but it is very useful.