problem 1)
This will work only if your application is running inside an crm context, as a crm web resource, you cannot run that code at the local machine. If the exception still persists, you are probably trying to do that from an non UI thread. In that case just write:
Deployment.Current.Dispatcher.BeginInvoke(() => { SilverlightUtility.GetSoapService(); // do something with service });
If an error is a compile time error, then you should follow this link: http://msdn.microsoft.com/en-us/library/gg594452.aspx
problem 2)
I never used organizationrequest this way. I reccommend you to use service.BeginRetrieve or service.BeginUpdate.
If you want to use service.BeginExecute() Here is an example of how to retrieve all contacts using QueryExpression and OrganizationRequest:
QueryExpression query = new QueryExpression()
{
EntityName = "contact",
ColumnSet = new ColumnSet()
{
AllColumns = true;
}
OrganizationRequest request = new OrganizationRequest() { RequestName = "RetrieveMultiple" };
request["Query"] = query;
IOrganizationService service = SilverlightUtility.GetSoapService();
service.BeginExecute(request, callBack, service);
The callback function should manage the retrieve operation event.
