Is it possible to create a Event Reciver program as Sandbox solution? - SharePoint 2010

Question

Dear All,
I try to create a Event receiver program as SandBox solution in SharePoint 2010. I want to do a list item updation using this event receiver.
Almost all the internet help & examples seems to be written with Farm solution and I got plenty of
errors in the code(since the code may be written for farm solutions).
So is it good idea that I am trying to do Sandbox Event Receiver???? Can any one please advice me
and if sandbox is feasible can anyone help me with a tutorial( How to create a sandbox event receiver for list item updation).
Somebody please help me soon.

Answer 1

Dear All,
hen I run the project, I got this error
There were deployment errors? do you want to continue. I pressed No button but
I cannot see any error list below in visual studio 2010!!! I am not able to
identify where is the error or rectify those error, somebody please help me soon.
I try to create one event receiver for list updation. I selected Event Receiver template
while created new project and added following code for debugging, debugger is not hitting!!!
please note my code below. Am I missing anything?????
EventReceiver1.cs
using Microsoft.SharePoint.Security;
using Microsoft.SharePoint.Utilities;
using Microsoft.SharePoint.Workflow;
namespace NewProjEventReceiver.EventReceiver1
    /// <summary>
    /// List Item Events
    /// </summary>
    public class EventReceiver1 : SPItemEventReceiver
        static void Main(string[] args)
       /// <summary>
       /// An item is being added.
       /// </summary>
       public override void ItemAdding(SPItemEventProperties properties)
           base.ItemAdding(properties);
       /// <summary>
       /// An item is being updated
       /// </summary>
       public override void ItemUpdating(SPItemEventProperties properties)
           base.ItemUpdating(properties);
           SPListItem CurrentItem = properties.ListItem;
           String strCustomer = CurrentItem["SampleList"].ToString();
           int startPos = 0;
           int endPos = CurrentItem["SampleList"].ToString().IndexOf(";#");
           int Cust_ID = Convert.ToInt32(strCustomer.Substring(startPos, endPos));
           SPWeb oWeb = properties.Web;
           SPList oList = oWeb.Lists["SampleList"];
           SPListItem Customers = oList.GetItemById(First_ID);
           CurrentItem["Title"] = "One Time";
           oWeb.AllowUnsafeUpdates = true;
           oWeb.Update();
           oWeb.AllowUnsafeUpdates = false;