milutinovici

    public class Offer<TProduct> : where TProduct : Product
    {
        public string Id { get; set; }
        public User Seller { get; set; }
        public TProduct Product { get; set; }
        public decimal Price { get; set; }
    }
    public class Product
    {
        public string Id { get; set; }

milutinovici

public class Product
{
  public int Id { get; set; }
  public string Manufacturer { get; set; }
  public string Name { get; set; }
}
public class Camera : Product
{
  public double Megapixels { get; set; }
}

milutinovici

public class GenericActionInvoker : ControllerActionInvoker
{
  protected override async Task<IActionResult> InvokeActionAsync(ActionExecutingContext actionExecutingContext)
        {
            var actionMethodInfo = _descriptor.MethodInfo;
            //find action
            if(actionExecutingContext.Controller.GetType().IsGenericType)
            {
                var parameters = actionMethodInfo.GetParameters().Select(x => x.ParameterType).ToArray();
                actionMethodInfo = actionExecutingContext.Controller.GetType().GetMethod(actionMethodInfo.Name, parameters);