Dan Soltesz -blog .NET geek in disguise

I created an extension that will allow you to traverse child entities easily so that you can remove each one from the parent.  Code is below.

public static class EntityExtensions
    {
        #region Static Methods (public)
       
        public static IEnumerable TraverseChildEntities ( this Entity parent, EntityContainer container )
        {
            IEnumerable entityCollectionProperties = from p in parent.GetType( ).GetProperties( )
                                                                   where
                                                                       p.PropertyType.IsGenericType
                                                                       && p.PropertyType.GetGenericTypeDefinition( ) == typeof ( EntityCollection<> )
                                                                   select p;

            //// For every entity list, bind to the entity removed event
            foreach ( PropertyInfo property in entityCollectionProperties )
            {
                var collectionType = property.PropertyType.GetGenericArguments()[0];
                EntitySet set;
                if (!container.TryGetEntitySet(collectionType,out set))
                {
                    continue;
                }
                var entityCollection = ( IEnumerable )property.GetValue( parent, null );
                foreach ( Entity entity in entityCollection )
                {
                    foreach ( Entity childEntity in entity.TraverseChildEntities(container ) )
                    {
                        yield return childEntity;
                    }

                    yield return entity;
                }
            }
        }
        #endregion
    }

 With this extension in place now when I want to delete a parent entity and related child entities I can do somethig like this.

foreach (var child in new List(Parent.TraverseChildEntities(DomainContext.EntityContainer)))
					{
						DomainContext.EntityContainer.GetEntitySet(child.GetType()).Remove(child);
					}

					DomainContext.Parents.Remove(parent);