using System;

public class Program

{

    public static void Main()

    {

        var itemInstance1 = new Item_Armour{UniqueFloat = "test1"};

        var itemInstance2 = new Item_Armour{UniqueFloat = "test2"};

        itemInstance2.OnItemEquipped(itemInstance2);

    }

}

​

public interface IItem

{

}

public abstract class Item<T> where T : IItem

{

    public virtual void OnItemEquipped(T item)

    {

    }

}

​

public class Item_Armour :Item<Item_Armour>,IItem

{

    public string UniqueFloat{get;set;}

    public override void OnItemEquipped(Item_Armour item)

    {

        UseUniqueFloat(item.UniqueFloat);

    }

​

    public void UseUniqueFloat(string uniqueFloat)

    {

        Console.WriteLine(uniqueFloat);

    }

}