Entity framework 4.1 with one to many navigation how to prevent cyclic loading of related entities ?

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Entity framework 4.1 with one to many navigation how to prevent cyclic loading of related entities ?

Ex: Two table have one to many relation

event and discount
Each event can have multiple discount s.

When I create a discount entity object I get the object of event with lazy loading. With event object I get the collection of related discounts and the cycle continue.

I am sure the performance will reduce if the data is large with this kind of loading.

How to handle such situation in Entity framework.

public Event() { public virtual ICollection<discount> discounts{ get; set; } }
public Discount { public virtual Event Event {get;set;} }