ServerVariables ASP.Net

for example  if we want to get the logged  current user ,
string UserName = Request.ServerVariables["LOGON_USER"];

Server Variable
ALL_HTTP
ALL_RAW
APPL_MD_PATH
APPL_PHYSICAL_PATH
AUTH_TYPE
AUTH_USER
AUTH_PASSWORD
LOGON_USER
REMOTE_USER
CERT_COOKIE
CERT_FLAGS
CERT_ISSUER
CERT_KEYSIZE
CERT_SECRETKEYSIZE
CERT_SERIALNUMBER
CERT_SERVER_ISSUER
CERT_SERVER_SUBJECT
CERT_SUBJECT
CONTENT_LENGTH
CONTENT_TYPE
GATEWAY_INTERFACE
HTTPS
HTTPS_KEYSIZE
HTTPS_SECRETKEYSIZE
HTTPS_SERVER_ISSUER
HTTPS_SERVER_SUBJECT
INSTANCE_ID
INSTANCE_META_PATH
LOCAL_ADDR
PATH_INFO
PATH_TRANSLATED
QUERY_STRING
REMOTE_ADDR
REMOTE_HOST
REMOTE_PORT
REQUEST_METHOD
SCRIPT_NAME
SERVER_NAME
SERVER_PORT
SERVER_PORT_SECURE
SERVER_PROTOCOL
SERVER_SOFTWARE
URL
HTTP_CONNECTION
HTTP_ACCEPT
HTTP_ACCEPT_ENCODING
HTTP_ACCEPT_LANGUAGE
HTTP_AUTHORIZATION
HTTP_HOST
HTTP_USER_AGENT

Example to get All Server Variables and it’s value ASP.net

<form id="form1" runat="server">     <div>         </div>         <table style="width: 512px; height: 51px" border="1" bordercolor="#ff3366">             <tr>                 <td style="width: 126px; text-align: center;">                     <strong>Server Variable</strong></td>                 <td style="width: 143px; text-align: center;">                     <strong>Value</strong></td>             </tr>             <%                 string[] strkey = Request.ServerVariables.AllKeys;                 for (int nCount = 0; nCount < strkey.Length; ++nCount)                 {             %>             <tr>                 <td style="width: 126px"><%= strkey[nCount] %></td>                 <td style="width: 143px"><%= Request.ServerVariables[strkey[nCount]] %></td>             </tr>             <%                 }             %>         </table>     </form>