Find IP Address in ASP.NET

string strIPAddress = "";

if (Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != "" && Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)

strIPAddress = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

else if (Request.ServerVariables["REMOTE_ADDR"] != "" && Request.ServerVariables["REMOTE_ADDR"] != null)

strIPAddress = Request.ServerVariables["REMOTE_ADDR"];

Response.Write("Your IP " + strIPAddress);