class Product
{
    public string name;
    public int Id { get; set; }

    public void ShowProduct()
    {
        Console.WriteLine("Id={0} ,Name={1}", Id, name);
    }
}

static void Main(string[] args)
{
    //dynamic對象
    dynamic dynProduct = new Product();

    //設置name字段
    dynProduct.name = "n1";

    //設置Id屬性
    dynProduct.Id = 1;
    dynProduct.Id = dynProduct.Id + 3;

    //調用ShowProduct方法
    dynProduct.ShowProduct();

    Console.ReadLine();
}

Type productType = typeof(Product);
Product p = new Product();

FieldInfo fi = productType.GetField("name",
    BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.DeclaredOnly);
fi.SetValue(p, "通過反射設置的值");