In this implementation of LicenseProvider, the GetLicense() member looks for a file called ClassName.LIC in the same directory as the .dll containing the component. It then uses the IsKeyValid() method to see if the file contains the key string provided by the GetKey() method. By default, the string is: "ClassName is a licensed component." You could derive a class that overrides one or both of these methods to provide a more complex .LIC file licensing scheme.

public class LicFileLicenseProvider : LicenseProvider {
// Public Constructors
   public LicFileLicenseProvider();
// Public Instance Methods
   public override License GetLicense(LicenseContext context, Type type, object instance, 
        bool allowExceptions);  // overrides LicenseProvider
// Protected Instance Methods
   protected virtual string GetKey(Type type);
   protected virtual bool IsKeyValid(string key, Type type);
}

Hierarchy

System.Object LicenseProvider LicFileLicenseProvider