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Microsoft Dynamics CRM (Archived)

Working with Entity Collections and needs to take join on two entity lists.

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Hi team,

I have one requirement i.,e I have two entity collections one for Entity A another for Entity B.

lets suppose Entity A is Account 

and Entity B is some custom entity which has Account Lookup in it.

In Entity Collection 1 I am getting all the accounts which are having Task activity.

In Entity Collection 2 I am retrieving the custom entity collection with some complex fetch Xmlquery and it has Account field value in list.

Now I want to get only the accounts those are not having any Task related to them so that i need to create new tasks for those.

So how can i do this with some simple joins or may be some lists manipulation.

I am new to LINQ and all that stuff so it would be appreciated for any suggestions.

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