c# - Interfaces or Attributes for Tagging Classes? -

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i have couple of classes wish tag particular attribute. have 2 approaches in mind. 1 involves using attribute-extending class. other uses empty interface:

attributes

public class foodattribute : attribute { }  [food] public class pizza { /* ... */ }  [food] public class pancake { /* ... */ }  if (obj.isdefined(typeof(foodattribute), false)) { /* ... */ }

interface

public interface ifoodtag { }  public class pizza : ifoodtag { /* ... */ } public class pancake : ifoodtag { /* ... */ }  if (obj ifoodtag) { /* ... */ }

i'm hesitant use attributes due usage of reflection. @ same time, however, i'm hesitant on creating empty interface serving tag. i've stress-tested both , time difference between 2 3 milliseconds, performance not @ stake here.

well, attributes, can create attribute in such way function doesn't propagate descendant types automatically.

with interfaces, that's not possible.

i go attributes.


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