How to retrieve username in this computer?

Gets the user name for the current thread (the name of the user currently logged on to the operating system). Here is the C# example from Help: using System; using System.Drawing; using System.Windows.Forms; namespace Screen_Example_cs { public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.Button button1; private System.Windows.Forms.ListBox listBox1; [STAThread] static void Main() { Application.Run(new Form1()); } public Form1() { this.button1 = new System.Windows.Forms.Button(); this.listBox1 = new System.Windows.Forms.ListBox(); // Get System Information Button this.button1.Location = new System.Drawing.Point(56, 16); this.button1.Size = new System.Drawing.Size(168, 23); this.button1.TabIndex = 0; this.button1.Text = "Get System Information"; this.button1.Click += new System.EventHandler(this.button1_Click); // System Information ListBox this.listBox1.Location = new System.Drawing.Point(8, 48); this.listBox1.Size = new System.Drawing.Size(280, 186); this.listBox1.TabIndex = 1; // Form1 this.ClientSize = new System.Drawing.Size(292, 273); this.Controls.AddRange(new System.Windows.Forms.Control[] { this.listBox1, this.button1}); this.Text = "System Information Example"; } private void button1_Click(object sender, System.EventArgs e) { // Get system information for the current machine. listBox1.Items.Add("ComputerName : " + SystemInformation.ComputerName ); listBox1.Items.Add("Network : " + SystemInformation.Network ); listBox1.Items.Add("UserDomainName : " + SystemInformation.UserDomainName ); listBox1.Items.Add("UserName : " + SystemInformation.UserName ); listBox1.Items.Add("BootMode : " + SystemInformation.BootMode ); listBox1.Items.Add("MenuFont : " + SystemInformation.MenuFont ); listBox1.Items.Add("MonitorCount : " + SystemInformation.MonitorCount ); listBox1.Items.Add("MonitorsSameDisplayFormat : " + SystemInformation.MonitorsSameDisplayFormat.ToString() ); listBox1.Items.Add("ArrangeDirection: " + SystemInformation.ArrangeDirection); listBox1.Items.Add("MousePresent : " + SystemInformation.MousePresent ); listBox1.Items.Add("MouseButtonsSwapped : " + SystemInformation.MouseButtonsSwapped ); listBox1.Items.Add("UserInteractive : " + SystemInformation.UserInteractive ); listBox1.Items.Add("VirtualScreen: " + SystemInformation.VirtualScreen ); } } }

All User in my computer

You need to use the "SystemInformation" Class, this is in the "System.Windows.Forms" NameSpace. string sUser = SystemInformation.UserName; Hope this helps you,