TheTalion

public class Item 
	{
		public int id;
		public int cost;
		public string name;
		public Sprite performance;
		public Sprite icon;
		public Item(int _cost, string _name, Sprite _perfomance, Sprite _icon){
			id = ++id;
			cost = _cost;
			name = _name;
			performance = _perfomance;
			icon = _icon;
		}
	}

public class Weapon : Item
{
	public int damage;
	public int distance;
	public Weapon (int _damage, int _distance, int _cost, string _name, Sprite _perfomance, Sprite _icon):base(_cost, _name, _perfomance,_icon)
	{
		damage = _damage;
		distance = _distance;
	}
}

public class Sword : Weapon
{
	public Sword (int _damage, int _distance, int _cost, string _name, Sprite _perfomance, Sprite _icon):base(_damage,_distance, _cost, _name,  _perfomance, _icon)
	{
	}
}

public Sprite GetSprite(string _name){
		Sprite[] textures = Resources.LoadAll<Sprite>("Weapon/Swords");
		string[] names = new string[textures.Length];

		for(int ii=0; ii< names.Length; ii++) {
			names[ii] = textures[ii].name;
		}

		Sprite sprite = textures[Array.IndexOf(names, _name)];
		return sprite;
	}

	void Start()//для проверки
	{
		item_L.Add (new Weapon (10, 1, 111, "noobsword" , GetSprite ("noobsword"), GetSprite ("noobsword")));
		item_L.Add (new Weapon (10, 1, 111, "epicsword" , GetSprite ("epicsword"), GetSprite ("epicsword")));
	}

i.transform.FindChild("Text").GetComponent<Text>().text = currentItem.name;
i.GetComponent<Image>().sprite = currentItem.icon;