How Do I Remove Items From A Many To Many (Entitity Framework) Generated Table.

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ASP.NET

entity-framework

I have two tables with a many to many relationship in Entity Framework 5 model, (MyLineItems and ItemDetails), Entity framework generated table MyLineItemsItemDetails

When i attempt to delete MyLineItems for a contract, I get a foreign key error. If I attempt to remove the items programatically, it removes the items from the MyLineItemItemDetails table but throws:

The operation failed: The relationship could not be changed because one or more of the foreign-key properties is non-nullable. When a change is made to a relationship, the related foreign-key property is set to a null value. If the foreign-key does not support null values, a new relationship must be defined, the foreign-key property must be assigned another non-null value, or the unrelated object must be deleted.

I don't want the ItemDetails deleted, just the items in MyLineItemItemDetails removed so I can delete MyLineItems.

How can this be done. I've checked on line and have yet to find a working solution.

Code snippet: var items = from c in MyLineItems select c;
foreach (var b in items)
{
b.ItemDetails.Clear();
//or both get the same error

//var ce = (from d in b.ItemDetails select d).ToList();
//for(int i=0;i<ce.count();> //{

// b.ItemDetails.Remove(ce[i]);
//}
}