using FishNet.Documenting; using System.Collections.Generic; namespace FishNet.Utility.Extension { [APIExclude] public static class ListFN { /// <summary> /// Adds a value to the list only if the value does not already exist. /// </summary> /// <param name="lst">Collection being added to.</param> /// <param name="value">Value to add.</param> public static void AddUnique<T>(this List<T> lst, T value) { if (!lst.Contains(value)) lst.Add(value); } } }