Dynamically loading classes (with custom behavior) from different assemblies?

Question

We are building an app for few customers, each has its own requirements along with the similar ones. We also want to keep all the code in the same app, not branch it, and the IF

Answer 1

You can create an instance of an external type from an assembly this way:

object obj = Activator.CreateInstance( 
    "External.Assembly.Name", "External.Assembly.Name.TypeName");
BaseClass b = (BaseClass) obj;
b.getEventId();

You'd store the name of the assembly and type in your configuration file or some other appropriate place.