代码如下：

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using Echevil;

namespace Network_Monitor_Sample
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class FormMain : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label LabelDownload;
		private System.Windows.Forms.Label LabelUpload;
		private System.Windows.Forms.Label LableDownloadValue;
		private System.Windows.Forms.Label LabelUploadValue;
		private System.Windows.Forms.ListBox ListAdapters;
		private System.Windows.Forms.Timer TimerCounter;
		private System.ComponentModel.IContainer components;

		public FormMain()
		{		
			InitializeComponent();
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
            this.components = new System.ComponentModel.Container();
            this.ListAdapters = new System.Windows.Forms.ListBox();
            this.LabelDownload = new System.Windows.Forms.Label();
            this.LabelUpload = new System.Windows.Forms.Label();
            this.LableDownloadValue = http://www.mamicode.com/new System.Windows.Forms.Label();>
如图：

c#-Winform实时显示上传下载速率