using System.Linq;

     public AreaOfEffect AreaOfEffect {get; set;}

     public TagSystem _tagSystem;
     public IEnumerable<Transform> GetEffectedUnits() {
          if (AreaOfEffect == null) {
               return Enumerable.Empty<Transform>();
          }
          return AreaOfEffect.GetEffectedUnits(EffectLocation);
     }

    AreaOfEffect Area { get; set; }

        var targets = Area.GetEffectedUnits(context.Caster);

        var targets = context.GetEffectedUnits();

        Area = effectRef.Area;

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using UnityEngine;
using System;
using System.Linq;
public class ApplyTagsEffect : IEffect
{
    bool FriendOrFoeOff { get; set; }
    public void Effect(EffectContext context) {
        // TODO: Apply friendOrFoeOff
        var targets = context.GetEffectedUnits().Select(t => t.GetComponent<TaggableUnit>()).Where(t => t!=null);
        context._tagSystem.ApplyTags(targets, context.CurrentTags.AsEnumerable());
    }
    public void Populate(EffectRef effectRef) {
        FriendOrFoeOff = effectRef.FriendOrFoeOff;
    }
}

    AreaOfEffect Area { get; set; }

        var targets = Area.GetEffectedUnits(context.Caster);

        Area = effectRef.Area;

    [SerializeField]

    [SerializeField]