nHydrate.Dsl.IndexColumn.OnDeleting C# (CSharp) Method

        protected override void OnDeleting()
        {
            if (this.Index != null)
            {
                if (!this.Index.Entity.nHydrateModel.IsLoading && !this.Index.Entity.IsDeleting)
                {
                    //If this is the primary key then CANCEL
                    if (this.Index.IndexType == IndexTypeConstants.PrimaryKey)
                        throw new Exception("This is a managed index for the primary key and cannot be removed.");

                    //If this is the last column then remove index
                    if (this.Index.IndexColumns.Count == 1)
                    {
                        using (var transaction = this.Store.TransactionManager.BeginTransaction(Guid.NewGuid().ToString()))
                        {
                            this.Index.Delete();
                            transaction.Commit();
                        }
                    }
                }
            }

            base.OnDeleting();
        }