Retrieve Entity record data into plugin var inputcontract = (localContext.InputParameters["Target"] as Entity).ToEntity<student_contract>(); // retrive entity data Account accountEntity = localContext.OrganizationService.Retrieve( Account.EntityLogicalName, inputcontract.student_Account.Id, new ColumnSet(new String[] { "student_eventseriesid" })).ToEntity<Account>(); // You can also set the value without entity context ["student_eventseriesid"] = accountEntity.GetAttributeValue<EntityReference>("student_eventseriesid")
Work smarter, not harder.