Get LDAP User Information Using C# with LDAP Connection

string txtEmp;

            string sa = System.Security.Principal.WindowsIdentity.GetCurrent().Name;

            txtEmp = sa.Split('\\')[1];

            string strDLdap = ConfigurationManager.AppSettings["myLDAPString"].ToString();

            DirectoryEntry connection = new DirectoryEntry(strDLdap);

            string strDLdAPUser = ConfigurationManager.AppSettings["myLDAPUser"].ToString();

            string strDLdAPPass =ConfigurationManager.AppSettings["myLDAPPassword"].ToString();

            connection.AuthenticationType = AuthenticationTypes.Secure;

            connection.Username = strDLdAPUser;

            connection.Password = strDLdAPPass;

            DirectorySearcher dssearch = new DirectorySearcher(connection);

            dssearch.Filter = "(sAMAccountName=" + txtEmp + ")";

            SearchResult sresult = dssearch.FindOne();

            DirectoryEntry dsresult = sresult.GetDirectoryEntry();

            string strfirstName = dsresult.Properties["givenName"][0].ToString();

            string strlastName = dsresult.Properties["sn"][0].ToString();

            string Name = strfirstName + "" + strlastName;

            string strRequestedBy = dsresult.Properties["mail"][0].ToString();

            string strComapnay = dsresult.Properties["company"][0].ToString();

            displayName = dsresult.Properties["displayName"][0].ToString();

            InsertUserInfo(displayName, strComapnay, DateTime.Now.ToString("MM-dd-yyyy"), strRequestedBy);