find type of context.result in asp core 3 and custom format result

i create a Action Filter for custom return context.result :

public class ResultApi : ActionFilterAttribute
{
    private readonly ResposeFormat resposeFormat;

    public ResultApi(ResposeFormat resposeFormat)
    {
        this.resposeFormat = resposeFormat;
    }
    public override void OnResultExecuting(ResultExecutingContext context)
    {
        resposeFormat.ContextResult(context);
        base.OnResultExecuting(context);
    }
}

i using the strategy pattern for change result format :

public abstract class ResposeFormat
{
    public abstract void ContextResult(ResultExecutingContext context);
}

and these are for implement the result Type :

public abstract class OkResultFormatter : ResposeFormat
{
    public override void ContextResult(ResultExecutingContext context)
    {
        if (context.Result is OkResult okResult)
            context.Result = new JsonResult(new ReturnResult(true, StatusCode.Success)) { StatusCode = okResult.StatusCode };
    }
}

BadRequest :

public abstract class BadRquestObjectresultFormatter : ResposeFormat
{
    public override void ContextResult(ResultExecutingContext context)
    {
        if (context.Result is BadRequestObjectResult badRequestObjectResult)
        {
            var message = badRequestObjectResult.Value.ToString();
            if (badRequestObjectResult.Value is SerializableError errors)
            {
                var errorMessages = errors.SelectMany(p => (string[])p.Value).Distinct();
                message = string.Join(" | ", errorMessages);
            }
            context.Result = new JsonResult(new ReturnResult(false, StatusCode.BadRequest, message)) { StatusCode = badRequestObjectResult.StatusCode };
        }
    }
}

i want when pass the context to the resposeFormat.ContextResult(context); it find the type of request and use the OkResultFormatter or BadRquestObjectresultFormatter .

how can i do this issue ????