custom workflow for create a record in dynamic crm 2011

senario: here we need to create a record in custom workflow.

need to do early bound.

Ex:


using System;
using System.Collections.Generic;
using System.Text;
using System.Activities;
using System.ServiceModel.Description;
using System.Workflow.ComponentModel;
//using System.Text;
using System.ServiceModel;
//using Microsoft.Crm.Sdk.Metadata;
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Client;
using Microsoft.Xrm.Sdk.Query;
using Microsoft.Xrm.Sdk.Discovery;
using Microsoft.Xrm.Sdk.Messages;
//using Microsoft.Crm.SdkTypeProxy;
using Microsoft.Xrm.Sdk.Workflow;

namespace create_invoice_record
{
    public class invoicerecord : CodeActivity
    {
        protected override void Execute(CodeActivityContext executionContext)
        {
            try
            {
                //Create the context and tracing service
                IExecutionContext context = executionContext.GetExtension<IExecutionContext>();
                IWorkflowContext workflowcontext = executionContext.GetExtension<IWorkflowContext>();
                IOrganizationServiceFactory serviceFactory = executionContext.GetExtension<IOrganizationServiceFactory>();
                IOrganizationService service = serviceFactory.CreateOrganizationService(context.UserId);
                ITracingService tracer = executionContext.GetExtension<ITracingService>();

                ColumnSet cols = new ColumnSet(true);
                var contact1 = service.Retrieve("salesorder", workflowcontext.PrimaryEntityId, cols);

                string ordername = contact1["name"].ToString();
                EntityReference customerref = (EntityReference)contact1["customerid"];
                EntityReference priceref = (EntityReference)contact1["pricelevelid"];
                Money totallineamount = (Money)contact1["totallineitemamount"];
                Money discountamt = (Money) contact1["discountamount"];
               Money taxamt = (Money)contact1["totaltax"];
               Money totalamt = (Money)contact1["totalamount"];
               int fixdiff = Convert.ToInt32(contact1["new_fixeddifference"]);

               Money invoicetotallineamt = new Money() { Value =(totallineamount.Value / fixdiff) };
               Money invoicediscountamt = new Money() { Value = (discountamt.Value / fixdiff) };
               Money invoicetaxamt = new Money() { Value = (taxamt.Value / fixdiff) };
               Money invoicetotalamt = new Money() { Value = (totalamt.Value / fixdiff) };


                Entity incidentEntity = new Entity();
                incidentEntity.LogicalName = "invoice";

                incidentEntity["name"] = ordername;
                incidentEntity["customerid"] = customerref;
                incidentEntity["pricelevelid"] = priceref;
                incidentEntity["totallineitemamount"] = invoicetotallineamt;
                incidentEntity["discountamount"] = invoicediscountamt;
                incidentEntity["totaltax"] = invoicetaxamt;
                incidentEntity["totalamount"] = invoicetotalamt;

                CreateRequest createrecord = new CreateRequest()
                {
                    Target=incidentEntity
                };


                CreateResponse res = (CreateResponse)service.Execute(createrecord);
              
                              


                //ClientCredentials Credentials = new ClientCredentials();



            }

            catch (Exception ex)
            {
                //Helpers.Throw(String.Format("An error occurred in the {0} workflow.",
                //        this.GetType().ToString()),
                //      ex);
                throw new InvalidPluginExecutionException("An error occurred in the plug-in.  ", ex);
            }
        }

    }
}