You can add the necessary dll from SDK which is available on internet or Click Here.
The code which is given below
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Client;
using System.ServiceModel.Description;
using System.Web.Services.Protocols;
using System.Runtime.Serialization;
using Microsoft.Xrm.Sdk.Messages;
using Microsoft.Xrm.Sdk.Metadata;
using Microsoft.Xrm.Sdk.Query;
namespace WebAppWalkthrough
{
public partial class _Default : System.Web.UI.Page
{
private OrganizationServiceProxy _serviceProxy;
private IOrganizationService _Orgservice;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
try
{
ClientCredentials cre = new ClientCredentials();
cre.UserName.UserName = "URNAME@DOMAINNAME.onmicrosoft.com";
cre.UserName.Password = "PASSWORD";
Uri serviceUri = new Uri("https://DOMAINNAME.crm5.dynamics.com/XRMServices/2011/Organization.svc");
OrganizationServiceProxy proxy = new OrganizationServiceProxy(serviceUri, null, cre, null);
proxy.EnableProxyTypes();
IOrganizationService service = (IOrganizationService)proxy;
Entity ent = new Entity("lead");
ent.Attributes["firstname"] = txtLeadNAme.Text;
ent.Attributes["subject"] = "Test by Aravind";
service.Create(ent);
}
catch (SoapException ex)
{
}
catch (Exception ex)
{
}
}
}
}