How can i save data temporarly and i can use another class file

any incoming ip

how can i use that ip in another class file

///
public class sdp : IHttpHandler
{
private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
string returnMsg;

public void ProcessRequest(HttpContext context)
{

var ip = context.Request.Headers["Host"];
// var ip = context.Request["HTTP_X_FORWARDED_FOR"] ?? context.Request.UserHostAddress;
log.DebugFormat("Received request from IP: {0}, Msisdn: {1}, Message: {2}",
ip, context.Request["msisdn"], context.Request["msg"]);
var status = Processor.Instance.Process(context.Request.Params["msisdn"], context.Request.Params["msg"]);
log.Info(status.Description);
context.Response.ContentType = "text/plain";
returnMsg = string.Format("<ussd><type>3<msg>{0}", status.Description);
log.Info(returnMsg);
context.Response.Write(returnMsg);
}