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Deleting parent and child like the following does work for me. The children are deleted before the parent and it is a single database roundtrip (one call to <code>SaveChanges</code>) with of course three DELETE statements in a single transaction: <pre><code>using (var ctx = new MyContext()) { var parent = ctx.MyEntities.Include(e => e.Children).FirstOrDefault(); foreach (var child in parent.Children.ToList()) ctx.MyEntities.Remove(child); ctx.MyEntities.Remove(parent); ctx.SaveChanges(); } </code></pre> (Using <code>ToList()</code> is necessary here because calling <code>Remove</code> for the children also removes from the parent's <code>Children</code> collection. Without using <code>ToList</code> a runtime exception would be thrown that the collection the <code>foreach</code> loop is iterating over has been modified.) The order in which <code>Remove</code> is called for children and parent doesn't matter. This works as well: <pre><code>using (var ctx = new MyContext()) { var parent = ctx.MyEntities.Include(e => e.Children).FirstOrDefault(); var children = parent.Children.ToList(); ctx.MyEntities.Remove(parent); foreach (var child in children) ctx.MyEntities.Remove(child); ctx.SaveChanges(); } </code></pre> EF sorts the DELETE statements in the correct order in both cases. Full test program (EF 5 / .NET 4.5 / SQL Server): <pre><code>using System.Collections.Generic; using System.Data.Entity; using System.Linq; namespace EFSelfReference { public class MyEntity { public int Id { get; set; } public string Name { get; set; } public int? ParentId { get; set; } public MyEntity Parent { get; set; } public ICollection<MyEntity> Children { get; set; } } public class MyContext : DbContext { public DbSet<MyEntity> MyEntities { get; set; } protected override void OnModelCreating(DbModelBuilder modelBuilder) { modelBuilder.Entity<MyEntity>() .HasOptional(e => e.Parent) .WithMany(e => e.Children) .HasForeignKey(e => e.ParentId); } } class Program { static void Main(string[] args) { Database.SetInitializer<MyContext>( new DropCreateDatabaseAlways<MyContext>()); using (var ctx = new MyContext()) { ctx.Database.Initialize(false); var parent = new MyEntity { Name = "Parent", Children = new List<MyEntity>() }; parent.Children.Add(new MyEntity { Name = "Child 1" }); parent.Children.Add(new MyEntity { Name = "Child 2" }); ctx.MyEntities.Add(parent); ctx.SaveChanges(); } using (var ctx = new MyContext()) { var parent = ctx.MyEntities.Include(e => e.Children) .FirstOrDefault(); foreach (var child in parent.Children.ToList()) ctx.MyEntities.Remove(child); ctx.MyEntities.Remove(parent); ctx.SaveChanges(); } } } } </code></pre> Screenshot after the first <code>using</code> block with current content in DB table before the entities are deleted: <img src="https://i.stack.imgur.com/GqALe.png" alt="screen 1"> Screenshot from SQL profiler after the last <code>SaveChanges</code>: <img src="https://i.stack.imgur.com/t7jpI.png" alt="screen 2"> I.e. <code>Child 1</code> (Id = 2) and <code>Child 2</code> (Id = 3) are deleted before <code>Parent</code> (Id = 1).
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1. POThe DELETE statement conflicted with the SAME TABLE REFERENCE constraint with Entity Framework
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