please help(ERROR's)

using System;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;




namespace D3D_basics
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        Devise DX_Device = null; // Drawing device
        

public dx()
{
    
   this.ClientSize = new Size(256,256); // Specify the client size
   this.Text = "My First DirectX Program"; // Specify the title
}

        public bool InitializeDirect3D()
{
   try
   {
     PresentParameters pps = new PresentParameters();
     pps.Windowed = true; // Specify that it will be in a window
     pps.SwapEffect = SwapEffect.Discard; // After the current screen is drawn, it will be automatically // deleted from memory
     DX_Device = new Device(0, DeviceType.Hardware, this, CreateFlags.SoftwareVertexProcessing, pps); // Put everything into the device
     return true;
   }
   catch(DirectXException e)
   {
     MessageBox.Show(e.ToString(), "Error"); // Handle all the exceptions
     return false;
   }
}
        
            static void Main()
{
dx form = new dx(); // Create the form
   
   if (form.InitializeDirect3D() == false) // Check if D3D could be initialized
   {
       
      MessageBox.Show("Could not initialize Direct3D.", "Error");
      return;
   }

   form.Show(); // When everything is initialized, show the form
   while(form.Created) // This is our message loop
   {
      form.Render(); // Keep rendering until the program terminates
      Application.DoEvents(); // Process the events, like keyboard and mouse input
   }
            }


    private void Render()
{ 
   if(DX_Device == null) // If the device is empty don't bother rendering
   {
      return;
   }



   DX_Device.Clear(ClearFlags.Target, Color.White, 1.0f, 0); // Clear the window to white
   DX_Device.BeginScene();

   // Rendering is done here

   DX_Device.EndScene();
   DX_Device.Present();
}
    }
 

}