Пример #1
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 public static IEnumerable <T> GetTraits <T>(this ICharacterTraitContainer traitContainer) where T : class, ICharacterTrait =>
 traitContainer.Traits.Select(a => a as T).Where(a => a != null);
Пример #2
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 public static bool HasTrait <T>(this ICharacterTraitContainer traitContainer, T trait) where T : ICharacterTrait =>
 traitContainer.Traits.Contains(trait);
Пример #3
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 public static T GetTrait <T>(this ICharacterTraitContainer traitContainer) where T : class, ICharacterTrait =>
 traitContainer.Traits.First(a => a is T) as T;