Querying Entity collection using LINQ

EntityCollection resulttemp = getContactEntityCollection(erRequest.Id, service);
                                if (resulttemp != null)
                                {
                                    List<Entity> listGCRQue = resulttemp.Entities.Where(e => (e.Contains("mms_reason") && ((OptionSetValue)e["OptionsetSchemaname"]).Value == 100000148 || ((OptionSetValue)e["OptionsetSchemaname"]).Value == 100000149 || ((OptionSetValue)e["OptionsetSchemaname"]).Value == 100000150 || ((OptionSetValue)e["OptionsetSchemaname"]).Value == 100000151)).ToList();
                                    List<Entity> listNonGCRQue = resulttemp.Entities.Where(e => (e.Contains("OptionsetSchemaname") && ((OptionSetValue)e["mms_reason"]).Value != 100000148 && ((OptionSetValue)e["OptionsetSchemaname"]).Value != 100000149 && ((OptionSetValue)e["OptionsetSchemaname"]).Value != 100000150 && ((OptionSetValue)e["OptionsetSchemaname"]).Value != 100000151)).ToList();

                                    if ((listGCRQue.Count > 0) || (listGCRQue.Count == 0 && listNonGCRQue.Count != 0 && (reasonValue == 100000148 || reasonValue == 100000149 || reasonValue == 100000150 || reasonValue == 100000151)))
                                    {
                                        throw new InvalidPluginExecutionException(OperationStatus.Canceled, "Error message");
                                    }
                                }


public EntityCollection getContactEntityCollection(Guid reqId, IOrganizationService service)
        {
            string fetchXml = "";
            fetchXml = "<fetch version='1.0' output-format='xml-platform' mapping='logical' distinct='false'>" +
                    "<entity name='incident'>" +                  
                    "<attribute name='OptionsetSchemaname' />" +
                    "<attribute name='incidentid' />" +
                    "<filter type='and'>" +
                    "<condition attribute='mms_requestid' operator='eq' value='" + reqId + "' />" +
                    "</filter>" +
                    "</entity>" +
                    "</fetch>";

            EntityCollection resulttemp = service.RetrieveMultiple(new FetchExpression(fetchXml));
            if (resulttemp != null && resulttemp.Entities.Count > 0)
                return resulttemp;
            else
                return null;
        }

How to share data b/w plugins

he Microsoft Dynamics CRM 2011 platform and the execution pipeline provides the ability to pass data from one plug-in to another through an IPluginExecutionContext property called SharedVariables. This property is a collection of key/value pairs which developers can use to share data between plug-ins which are registered on both the pre and post events.

 Here is a simple code snippet which shows shared variables in action. We may perform some data validation on the pre-create stage of an Account and then pass an updateRelated boolean variable to a post-create Account plug-in which can perform some additional business logic such as asynchronously updating child records of an Account. Pre-Create Account Plug-in if (context.InputParameters.ContainsKey("Target") && context.InputParameters["Target"] isEntity) { Entity target = context.InputParameters["Target"] as Entity; if (target != null) { // some wacky data validation string city = target.GetAttributeValue("address1_city") ?? string.Empty; int numEmployees = target.GetAttributeValue("numberofemployees"); int accountCategory = target.GetAttributeValue("accountcategorycode"); // city is auckland, numEmployees > 100, account category is preferred customer bool updateRelated = city.Equals("Auckland",StringComparison.InvariantCultureIgnoreCase) && numEmployees > 100 && accountCategory == 1; context.SharedVariables.Add("updatedRelated", updateRelated); } } Post-Create Account Plug-in if (context.InputParameters.ContainsKey("Target") && context.InputParameters["Target"] isEntity) { Entity target = context.InputParameters["Target"] as Entity; if (target != null) { if (context.SharedVariables.ContainsKey("updatedRelated")) { bool updateRelated = (bool)context.SharedVariables["updatedRelated"]; if (updateRelated) { // additional logic to update related records of the Account } } } } That’s all there is to it. This technique lets you build complex plug-ins and pass data between plug-ins without having to set hidden fields on entities.