Early bound plugin, can't use loadProperty

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The following code snippet is throwing a "Collection was modified; enumeration operation may not execute", specifically on the loadProperty. I can't quite figure out why, and all my workarounds haven't worked out for me. Any suggestions? I basically just want to load in all sales order details on the order.

public void ExecutePluginLogic(IServiceProvider serviceProvider)
        {
            // Use a 'using' statement to dispose of the service context properly
            // To use a specific early bound entity replace the 'Entity' below with the appropriate class type
            using (var localContext = new LocalPluginContext<Entity>(serviceProvider))
            {
                var activeOrders = (
                    from o in localContext.CrmContext.CreateQuery<SalesOrder>()
                    where o.StateCode.Equals(SalesOrderState.Active)
                    select o).Take(5).ToList();

                foreach (var order in activeOrders)
                {
                    localContext.CrmContext.LoadProperty(order, nameof(SalesOrder.order_details));
                }
            }
        }

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Community Member on at

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RE: Early bound plugin, can't use loadProperty

Hi Dnar,

I recently have the same issure you have here. Could you share your finding if there's any?

Thanks in advance!

Regards,

Junjie
Suggested answer

Michel van den Brink on at

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RE: Early bound plugin, can't use loadProperty

Hello Dnar,

The issue you are experiencing has to do with the way collections can be enumerated with an IEnumerable implementation. An implementation of IEnumerable makes a class compatible with foreach, such as List<T> and arrays.

There is one quirk to these IEnumerable classes, while you are looping through an instance of them, you are not allowed to change the instance you are looping though. This is a fail safe mechanism to make sure the foreach-loop doesn't lose its place in the collection, as you are changing the collection you are looping though you might have also added/removed items, which might break the loop.

.

You can remedy this by using a regular for-loop instead

public void ExecutePluginLogic(IServiceProvider serviceProvider) { // Use a 'using' statement to dispose of the service context properly // To use a specific early bound entity replace the 'Entity' below with the appropriate class type using (var localContext = new LocalPluginContext<Entity>(serviceProvider)) { var activeOrders = ( from o in localContext.CrmContext.CreateQuery<SalesOrder>() where o.StateCode.Equals(SalesOrderState.Active) select o).Take(5).ToList(); for (int i = 0; i < activeOrders.Count; i++) { localContext.CrmContext.LoadProperty(activeOrders[i], nameof(SalesOrder.order_details)); } } }

Hope this helps you out, let me know if the code doesn't work for you or if you have additional questions.

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