Getting MAC Address of Client Machine in C#

//Add the following Using
using System;
using System.IO;
// Add a webform in your web app and modify the code for Page_Load event as follows:
protected void Page_Load(object sender, EventArgs e)
{
string MyDomainPrefix = @"CONTOSO\\"; //replace CONTOSO with your network domain
string currentUserLoginName = Request.LogonUserIdentity.Name.Replace(MyDomain, string.Empty); // Get the current Windows authenticated user
string myCommandToRun = "/c nbtstat -a " + Request.UserHostName + @" >> " + AppDomain.CurrentDomain.BaseDirectory +
currentUserLoginName + ".txt"; // Command line to run, I am creating my text file in the web application folder on the server.
Note: nbtstat command does not work on my client machine with Windows 7.
//Execute the command
System.Diagnostics.Process process = new System.Diagnostics.Process();
process.StartInfo.CreateNoWindow = true;
process.StartInfo.FileName = "cmd.exe";
process.StartInfo.Arguments = myCommandToRun;
process.Start();
process.WaitForExit();
//Start parsing the file created on disk
StreamReader sr = new StreamReader(AppDomain.CurrentDomain.BaseDirectory + currentUserLoginName + ".txt");
string MyLine = null;
MyLine = sr.ReadToEnd();
string[] MyStrings = MyLine.Trim().Split('\n'); //Array of strings from text file split by the return char
foreach (string item in MyStrings)
{
if (item.Trim().Contains("MAC Address"))
{
//Get the MAC Address
Response.Write(item.ToString().Remove(0,item.IndexOf('=')+1).Trim());
}
}
}