具有泛型類型的父子類轉換

Question

我有3個名為OptionFeature ， Fabric ， Material

Fabric是Material的子類。

現在，我有一個OptionFeature<Fabric>類型的對象。 如何將此對象轉換為OptionFeature<Material>

Answer 1

試試這個

    class Program
    {
        static void Main(string[] args)
        {
            OptionFeature optionFeature = new OptionFeature();
            optionFeature.material = new Material();
            Fabric fabric = (Fabric)optionFeature.material;
            List<Material> materials = new List<Material>();
            List<Fabric> fabrics = materials.Select(x => (Fabric)x).ToList();


        }
    }
    public class OptionFeature
    {
        public Material material {get;set;}
    }
    public class Material
    {
    }
    public class Fabric : Material
    {
    }​