Wie bereits im Java Forum gepostet zeig ich euch auch noch wie ihr in C# die Mac-Adresse rausfindet.

Beachtet, dass ihr hierfür die Library benötigt.

Hier stelle ich euch ein kleines tool mit GUI vor welches ich entwickelt habe um die Mac-Adresse auszulesen:

DefaultGUI.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Management;
using System.Collections;

namespace MacGrabber
{
 public partial class DefaultGUI : Form
 {
 public DefaultGUI()
 {
 InitializeComponent();
 getNetworkData();
 }

 List<NetworkItem> NetworkData = new List<NetworkItem>();

 private void getNetworkData()
 {

 int i = 0;
 try
 {
 ManagementObjectSearcher query = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration");
 ManagementObjectCollection queryCollection = query.Get();
 foreach (ManagementObject mo in queryCollection)
 {

 if (mo["MacAddress"] != null && mo["IPAddress"] != null)
 {
 NetworkData.Add(new NetworkItem(i, mo["Description"].ToString(), mo["MacAddress"].ToString().Replace(":", "")));
 }
 }
 }
 catch (Exception ex)
 {
 Console.WriteLine(ex.Source);
 Console.WriteLine(ex.Message);
 }

 foreach (NetworkItem item in NetworkData)
 comboBoxMacList.Items.Add(item);
 if (this.comboBoxMacList.Items.Count > 0)
 this.comboBoxMacList.SelectedIndex = 0;

 }
 private void label1_Click(object sender, EventArgs e)
 {

 }

 private void Form1_Load(object sender, EventArgs e)
 {

 }

 private void textBoxMacField_TextChanged(object sender, EventArgs e)
 {

 }

 private void setClipboard(string cbtext)
 {
 Clipboard.SetText(cbtext);
 }

 private void comboBoxMacList_SelectedIndexChanged(object sender, EventArgs e)
 {

 NetworkItem selectedItem = (sender as ComboBox).SelectedItem as NetworkItem;
 if (selectedItem != null)
 {
 settextBoxMacField(selectedItem.getMacAddr());
 setClipboard(selectedItem.getMacAddr());
 }
 }
 }
}

DefaultGUIDesigner.cs

namespace MacGrabber
{
 partial class DefaultGUI
 {
 /// <summary>
 /// Required designer variable.
 /// </summary>
 private System.ComponentModel.IContainer components = null;

 /// <summary>
 /// Clean up any resources being used.
 /// </summary>
 /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
 protected override void Dispose(bool disposing)
 {
 if (disposing && (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()
 {
 System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(DefaultGUI));
 this.labelMac = new System.Windows.Forms.Label();
 this.textBoxMacField = new System.Windows.Forms.TextBox();
 this.comboBoxMacList = new System.Windows.Forms.ComboBox();
 this.SuspendLayout();
 //
 // labelMac
 //
 this.labelMac.AutoSize = true;
 this.labelMac.Location = new System.Drawing.Point(13, 7);
 this.labelMac.Name = "labelMac";
 this.labelMac.Size = new System.Drawing.Size(72, 13);
 this.labelMac.TabIndex = 0;
 this.labelMac.Text = "Mac-Adresse:";
 this.labelMac.Click += new System.EventHandler(this.label1_Click);
 //
 // textBoxMacField
 //
 this.textBoxMacField.Location = new System.Drawing.Point(90, 4);
 this.textBoxMacField.Name = "textBoxMacField";
 this.textBoxMacField.Size = new System.Drawing.Size(208, 20);
 this.textBoxMacField.TabIndex = 1;
 this.textBoxMacField.TextChanged += new System.EventHandler(this.textBoxMacField_TextChanged);
 //
 // comboBoxMacList
 //
 this.comboBoxMacList.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
 this.comboBoxMacList.Location = new System.Drawing.Point(16, 30);
 this.comboBoxMacList.Name = "comboBoxMacList";
 this.comboBoxMacList.Size = new System.Drawing.Size(282, 21);
 this.comboBoxMacList.TabIndex = 2;
 this.comboBoxMacList.SelectedIndexChanged += new System.EventHandler(this.comboBoxMacList_SelectedIndexChanged);
 //
 // DefaultGUI
 //
 this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
 this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
 this.ClientSize = new System.Drawing.Size(310, 58);
 this.Controls.Add(this.comboBoxMacList);
 this.Controls.Add(this.textBoxMacField);
 this.Controls.Add(this.labelMac);
 this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
 this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
 this.Name = "DefaultGUI";
 this.Text = "Mac Grabber";
 this.Load += new System.EventHandler(this.Form1_Load);
 this.ResumeLayout(false);
 this.PerformLayout();

 }

 #endregion

 private void settextBoxMacField(string text) { this.textBoxMacField.Text = text; }
 private void addComboBoxMacList(string item) { this.comboBoxMacList.Items.Add(item); }

 private System.Windows.Forms.Label labelMac;
 private System.Windows.Forms.TextBox textBoxMacField;
 public System.Windows.Forms.ComboBox comboBoxMacList;
 }
}

NetworkItem.cs 

using System;
using System.Management;
using System.Windows.Forms;
using System.Collections;

public class NetworkItem
{
 public NetworkItem(int id, String desc, String mac)
 {
 this.id = id;
 this.description = desc;
 this.macaddr = mac;
 }

 public String getMacAddr()
 {
 return this.macaddr;
 }

 public String getDescription()
 {
 return this.description;
 }

 public int getID()
 {
 return this.id;
 }

 public override string ToString()
 {
 return this.description;
 }

 private String macaddr;
 private String description;
 private int id;

}

Program.cs 

using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace MacGrabber
{
 static class Program
 {
 /// <summary>
 /// The main entry point for the application.
 /// </summary>
 [STAThread]
 static void Main()
 {

 Application.EnableVisualStyles();
 Application.SetCompatibleTextRenderingDefault(false);
 Application.Run( new DefaultGUI() );

 }
 }
}

Auf wunsch publiziere ich gerne auch den Sourcecode in einem VS Projekt, bzw. die Binary in einem Archiv.