Web Development

<%@ Page Language="C#" MasterPageFile="~/FormularMasterPage.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Form_Default" Title="Test Page" %><br />
<asp:Content ID="Content1" ContentPlaceHolderID="Head" runat="Server"><br />
<asp:TextBox ID="Textbox1" runat="server" Visible="true" ReadOnly="true" BorderStyle="None" BorderWidth="0" /><br />
</asp:Content><br />

using System;<br />
using System.Data;<br />
using System.Configuration;<br />
using System.Collections;<br />
using System.Security;<br />
using System.Security.Principal;<br />
using System.Web;<br />
using System.Web.Security;<br />
using System.Web.UI;<br />
using System.Web.UI.WebControls;<br />
using System.Web.UI.WebControls.WebParts;<br />
using System.Web.UI.HtmlControls;<br />
<br />
public partial class Form_Default : System.Web.UI.Page<br />
{<br />
public string WinUser = "";<br />
<br />
protected void Page_Load(object sender, EventArgs e)<br />
{<br />
        WinUser = System.Security.Principal.WindowsIdentity.GetCurrent().Name.ToString().Substring(5); <br />
<br />
Textbox1.text = WinUser;<br />
}<br />
}