נושא: c# directx

using System;
using System.Drawing;
using System.Windows.Forms;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;

public class MainForm : Form
{
	Device device = null;

	/// <summary>
	///	When the form is clicked, we close it and stop
	///	the application
	/// </summary>
	protected override void OnClick(EventArgs e)
	{
		this.Close();
		base.OnClick (e);
	}

	
	/// <summary>
	///	In the constructor we initialize the device using
	///	the default adapter and the current display mode
	/// </summary>
	public MainForm()
	{
		AdapterInformation adapter = Manager.Adapters.Default;
	
		PresentParameters presentation = new PresentParameters ();
		presentation.BackBufferFormat = adapter.CurrentDisplayMode.Format;
		presentation.BackBufferWidth = adapter.CurrentDisplayMode.Width;
		presentation.BackBufferHeight = adapter.CurrentDisplayMode.Height;		
		presentation.SwapEffect	= SwapEffect.Flip;
		presentation.Windowed = false;
		
		// Place it in a try catch block just 
		//in case it goes wrong for
		// some reason.
		try
		{
			// To make things simple, we'll just 
			//use the reference device, and
			// software vertex processing. 
			//Although this will be extrelemly slow
			// it doesn't matter in this case.
			// It will definetly work on 
			// all machines, so it saves us doing 
			//enumeration for now.
			device = new Device (adapter.Adapter,  
						DeviceType.Reference,
						this,
						CreateFlags.SoftwareVertexProcessing,
						presentation);
		}
		ca tch (DirectXException e)
		{
			MessageBox.Show (e.Message);
			return;
		}
	}


	/// <summary>
	///	Clear the screen with a blue color
	/// </summary>
	public void Render()
	{
		device.Clear(ClearFlags.Target, Color.Blue, 1.0f, 0);
		device.Present();
	}


	/// <summary>
	///	The entry point where the main render loop goes
	/// </summary>
	static void Main() 
	{
		using (MainForm form = new MainForm())
		{
			form.Show();
			
			while (form.Created)
			{
				form.Render();
				Application.DoEvents();
			}
		}
	}
}

כאשר אני מריץ את את התוכנית הקומפילר כותב לי שיש יותר מכניסה אחת

 has more then one entry point