从命令行打开winform

我是c#新手，这个项目只是为了学习。我试图使一个程序，其中用户在命令行输入一些信息，然后结果显示在窗体窗口。我怎样才能做到呢?

这是我失败的尝试:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Øving1
{
    class Program
    {
       static int Length;
       static int Width;
        [STAThread]
        static void Main(string[] args)
        {
            GUI test = new GUI();
            Console.WriteLine("Dette Programet regner ut areal og omkrets av et rektangel, angi en lengde og brede(eks. 10 enter 10)");
            Length = Convert.ToInt32(Console.ReadLine());
            Width = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("AREAL: " + Area(Length, Width) + " OMKRETS: " + Circumference(Length, Width));

            test.richTextBox1.Clear();
            test.richTextBox1.AppendText("AREAL: " + Area(Length, Width) + " OMKRETS: " + Circumference(Length, Width));
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(test);

        }
        public static int Area(int Length, int Width)
        {
            return Length * Width;
        }
        public static int Circumference(int Length, int Width)
        {
            return (Length * 2) + (Width * 2);
        }