I created a simple windows application just to see how to make use of IOrganizationService within CRM 2011.

Here we need to add references to the following dlls

1. Microsoft.Xrm.Sdk.
2. System.ServiceModel.
3. System.Runtime.Serialization.

This is the sample code

Uri organizationUri = new Uri("http://crmservername/orgname/XRMServices/2011/Organization.svc");
Uri homeRealmUri = null;
ClientCredentials credentials = new ClientCredentials();
// set default credentials for OrganizationService
credentials.Windows.ClientCredential = (NetworkCredential)CredentialCache.DefaultCredentials;
// or
credentials.Windows.ClientCredential = System.Net.CredentialCache.DefaultNetworkCredentials;
OrganizationServiceProxy orgProxy = new OrganizationServiceProxy(organizationUri, homeRealmUri, credentials, null);
IOrganizationService _service = (IOrganizationService)orgProxy;
try
{
    Entity myAccount = new Entity("account");
    myAccount["name"] = "Test Account";
    _service.Create(myAccount);
}
catch (Exception ex)
{
    MessageBox.Show(ex.Message);
}
}

Hi,

Today i was just trying to check if the dependent picklist code generated using Microsoft Dynamics CRM Demonstartion Tools for CRM 4.0 will work for CRM 2011 or not.

So i downloaded the tool

http://www.microsoft.com/downloads/en/details.aspx?FamilyID=634508DC-1762-40D6-B745-B3BDE05D7012&displaylang=en

I was able to connect CRM 2011 using that tool. Then i generated the code using the tool.

I tried using that code inside CRM 2011 and it worked properly.

Only thing we need to do is to wrap the entire onload code generated by tool inside a function and call that function on the onload of the form and same thing for the onchange code.

Bye.