Bulk Create - Bulk Upload Records in MSCRM2011

1. Create a function which accept list of entity
  public static void BulkUpload(List<Entity> _ListEntity)
        {

            ExecuteMultipleRequest requestWithResults = new ExecuteMultipleRequest()
                {
                    // Assign settings that define execution behavior: continue on error, return responses.
                    Settings = new ExecuteMultipleSettings()
                    {
                        ContinueOnError = false,
                        ReturnResponses = true
                    },
                    // Create an empty organization request collection.
                    Requests = new OrganizationRequestCollection()
                };

            // Create several (local, in memory) entities in a collection.
            EntityCollection input = new EntityCollection(_ListEntity);

            // Add a CreateRequest for each entity to the request collection.
            foreach (var entity in input.Entities)
            {
                CreateRequest createRequest = new CreateRequest { Target = entity };
                requestWithResults.Requests.Add(createRequest);
            }

            CrmServiceConnector crmServiceConnector = new CrmServiceConnector();
            //  crmServiceConnector.CallMultitpleExecuteMethod(requestWithResults, null, false);

            // Execute all the requests in the request collection using a single web method call.
            ExecuteMultipleResponse responseWithResults = crmServiceConnector.CallMultitpleExecuteMethod(requestWithResults, null, false);


            // Display the results returned in the responses.
            foreach (var responseItem in responseWithResults.Responses)
            {
                //// A valid response.
                //if (responseItem.Response != null)
                //  //  DisplayResponse(requestWithResults.Requests[responseItem.RequestIndex], responseItem.Response);

                //// An error has occurred.
                //else if (responseItem.Fault != null)
                //    DisplayFault(requestWithResults.Requests[responseItem.RequestIndex],
                //        responseItem.RequestIndex, responseItem.Fault);
            }

        }

2. Function to execute request

 public ExecuteMultipleResponse CallMultitpleExecuteMethod(ExecuteMultipleRequest request, string organizationName, bool useAdminCredentials)
        {
            if (!isConnected)
            {
                Connect(useAdminCredentials);
            }

            try
            {
             
                ExecuteMultipleResponse responseWithResults =
               (ExecuteMultipleResponse)service.Execute(request);
                return responseWithResults;
            }
            catch (Exception exception)
            {
                StringBuilder parameterInfo = new StringBuilder();
                parameterInfo.Append(String.Format("request : {0}", (request == null) ? "request Null" : request.ToString()));
                return null;
                // throw ExceptionMethods.ProcessWebServiceException(exception, WebServiceCallParameterInfo, parameterInfo.ToString());
            }
        }