If there is a situation when standard rules cannot define an Issue Box or are too complex, you can use requests of external .NET methods available for IBN. The method of the class must be implemented in the form of external assembly and registered in the system. After registration, the method can be used equally with standard expressions.
Example of determining the presence of keywords in the line ([C #] code):

SQL- registration file:

The function will search for presence of the line “OSVER: ABC DEF WINXP” in the Issue title.
