CRM 2011: Plug-in - Could not load file or assembly 'Microsoft.Xrm.Client'

Question

I am looking to build a fairly simple plug in that calculates the amount of "units" used & remaining. I have two custom entites bc_learninglicences & bc_llbalance , the plug - in fires on create of bc_llbalance and another for update.

bc_llbalance: Contains
    bc_learninglicense (Look up field on bc_learninglicences / bc_name)
    bc_units (units that are used by this record)

bc_learninglicences: Contains 
    bc_name
    bc_unitsquantity (This is set to the total qty of units)
    bc_unitsused (this needs to inherit the sum of "bc_units" on "bc_llbalance")
    bc_unitsremaining ( simply bc_unitsquantity - bc_unitsused )

Ok so I have included the code which is obviously not finished as I have just been trying to figure out how to get bc_unitsused to inherit the sum... this code builds without error. however CRM errors:

Unexpected exception from plug-in (Execute): LearningLicenses.LearningLicenses: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Xrm.Client, Version=5.0.9690.2165

I have a short deadline to build this as the system is due to go live soon, however I cannot move forward with this error which I don't understand...

Either help with error or code/solution will be appreciated at this point as I'm behind on the time frame for this project.

ps I am new to developing for CRM 2011 with only a few weeks/ few projects experience.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Query;
using Microsoft.Xrm.Sdk.Messages;
using System.Text.RegularExpressions;
using System.ServiceModel;

namespace LearningLicenses
{
    public class LearningLicenses : IPlugin
    {

        public void Execute(IServiceProvider serviceProvider)
        {
            try
            {

                // Obtain the execution context from the service provider.
                Microsoft.Xrm.Sdk.IPluginExecutionContext context = (Microsoft.Xrm.Sdk.IPluginExecutionContext)
                    serviceProvider.GetService(typeof(Microsoft.Xrm.Sdk.IPluginExecutionContext));

                //Extract the tracing service for use in debugging sandboxed plug-ins.
                ITracingService tracingService =
                    (ITracingService)serviceProvider.GetService(typeof(ITracingService));

                if (context.InputParameters.Contains("Target") &&
                        context.InputParameters["Target"] is Entity)
                 {

                     // Obtain the target entity from the input parmameters.
                     Entity entity = (Entity)context.InputParameters["Target"];

                IOrganizationServiceFactory serviceFactory = (IOrganizationServiceFactory)serviceProvider.GetService(typeof(IOrganizationServiceFactory));
                IOrganizationService service = serviceFactory.CreateOrganizationService(context.UserId);

                EntityReference a = (EntityReference)entity.Attributes["bc_learninglicense"];// ((EntityReference)targetEntity.Attributes["bc_learninglicense"]).Id;


                if (entity.LogicalName == "bc_llbalance")
                        try
                        {  

                            //fetchxml to get the sum total of estimatedvalue
                            string value_sum = string.Format(@"         
                    <fetch distinct='false' mapping='logical' aggregate='true'> 
                        <entity name='bc_llbalance'>
                            <attribute name='bc_units' alias='units_sum' aggregate='sum' />
                               <filter type='and'>
                                <condition attribute='bc_learninglicense' operator='eq' value='{0}' uiname='' 
                               </filter>
                        </entity>
                    </fetch>", a.Id);

                            FetchExpression fetch = new FetchExpression(value_sum);
                            EntityCollection value_sum_result = service.RetrieveMultiple(fetch);
                            var TotalValue = "";
                            // decimal TotalValue = 0;
                            foreach (var c in value_sum_result.Entities)
                            {
                                TotalValue = ((string)((AliasedValue)c["value_sum"]).Value);
                            }

                            Entity llc = new Entity("bc_learninglicences");
                            llc.Id = a.Id;
                            llc.Attributes.Add("bc_unitsused", TotalValue);

                            service.Update(llc);

                        }
                        catch (FaultException ex)
                        {
                            throw new InvalidPluginExecutionException("An error occurred in the plug-in.", ex);
                        }
                }

            }
            catch (FaultException ex)
            {
                throw new InvalidPluginExecutionException("An error occurred in the plug-in.", ex);
            }
        }
    }
 }



THE ERROR : 

Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: Unexpected exception from plug-in (Execute): LearningLicenses.LearningLicenses: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Xrm.Client, Version=5.0.9690.2165, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.Detail: 
<OrganizationServiceFault xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.microsoft.com/xrm/2011/Contracts">
  <ErrorCode>-2147220956</ErrorCode>
  <ErrorDetails xmlns:d2p1="http://schemas.datacontract.org/2004/07/System.Collections.Generic" />
  <Message>Unexpected exception from plug-in (Execute): LearningLicenses.LearningLicenses: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Xrm.Client, Version=5.0.9690.2165, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.</Message>
  <Timestamp>2013-01-22T10:09:22.0275105Z</Timestamp>
  <InnerFault i:nil="true" />
  <TraceText>

[LearningLicenses: LearningLicenses.LearningLicenses]
[c1b35170-c563-e211-8c6d-b499bafd5e5b: LearningLicenses.LearningLicenses: Create of bc_llbalance]


</TraceText>
</OrganizationServiceFault>

Answer 1

Microsoft.Xrm.Client is not used by CRM and so is not present in the GAC or anywhere on the CRM server, it is intended to be redistributed with any client applications that require it.

It shouldn't need to be referenced in your Plugin assembly at all, so I would remove it and see if any of your code references it. If it does it should be able to be replaced with equivalent code that doesn't use that assembly.

Answer 2

有两种方法可以解决此问题，首先，您可能要检查GAC中是否提供了SDK，但是我们在内部使用ILMerge引入了插件所需的所有依赖项。