public static string GetPostParams(HttpContext context)

        {

            string param = string.Empty;

            if (context.Request.Method.ToLower().Equals("post"))

            {

                param += "[post]";

                foreach (var key in context.Request.Form.Keys.ToList())

                {

                    param += key + ":" + context.Request.Form[key].ToString();

                }

            }

            else if (context.Request.Method.ToLower().Equals("get"))

            {

                param += "[get]"+context.Request.QueryString.Value;

            }

            else

            {

                param += "[" + context.Request.Method + "]";

            }

            return param;

        }

namespace Microsoft.AspNetCore.Mvc

public abstract class ControllerBase

{

    public HttpRequest Request { get; }

}

public abstract class HttpContext

{

    public abstract HttpRequest Request { get; }

}

    [HttpPost]

        public IActionResult P_Leave()

    {

        var title = Request.HttpContext;

            var t = Request.Form["sets"].ToString();

}