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copied!<p>I encountered the same issue and finally came up with a solution. The basic idea is to prevent certain navigational class type from attaching to the ObjectContext. Here is what I did:</p> <ol> <li>Modified the context.tt template to make SelfTrackingEntitiesContextExtensions class partial.</li> <li>Copy the 2 ApplyChanges functions to newly created Custom.Context.Extension.cs and rename them as CustomApplyChanges. Each will have one additional parameter as array of Type</li> </ol> <blockquote> <p>public static void CustomApplyChanges(this ObjectContext context, string entitySetName, TEntity entity, <strong>Type[] excludeTypes</strong>) where TEntity : IObjectWithChangeTracker</p> </blockquote> <ol start="3"> <li>Add a condition to the for loop to exclude any class type contains in the excludeTypes array.</li> </ol> <blockquote> <p>region Handle Initial Entity State</p> <p>foreach (IObjectWithChangeTracker changedEntity in entityIndex.AllEntities.Where(x => x.ChangeTracker.State == ObjectState.Deleted && <strong>!excludeTypes.Contains(x.GetType())))</strong> { HandleDeletedEntity(context, entityIndex, allRelationships, changedEntity); }</p> <p>foreach (IObjectWithChangeTracker changedEntity in entityIndex.AllEntities.Where(x => x.ChangeTracker.State != ObjectState.Deleted <strong>&& !excludeTypes.Contains(x.GetType())))</strong> { HandleEntity(context, entityIndex, allRelationships, changedEntity); }</p> <p>endregion</p> </blockquote> <ol start="4"> <li>The usage</li> </ol> <blockquote> <p>Type[] excludeTypes = { typeof(Asset), typeof(Address), typeof(Region)};</p> <p>rep.Entities.CustomApplyChanges(entity, excludeTypes); var changedEntry = rep.Context.ObjectStateManager.GetObjectStateEntries>(System.Data.EntityState.Added | System.Data.EntityState.Modified | System.Data.EntityState.Deleted); foreach (var e in changedEntry) { if (excludeTypes.Any(c => c == e.Entity.GetType())) { rep.Context.Detach(e.Entity); //detach unchanged objects } }</p> </blockquote>

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