System.Data.UniqueConstraint.IsConstraintViolated C# (CSharp) Метод

        internal override bool IsConstraintViolated()
        {
            bool result = false;
            Index index = ConstraintIndex;
            if (index.HasDuplicates)
            {
                object[] uniqueKeys = index.GetUniqueKeyValues();

                for (int i = 0; i < uniqueKeys.Length; i++)
                {
                    Range r = index.FindRecords((object[])uniqueKeys[i]);
                    if (1 < r.Count)
                    {
                        DataRow[] rows = index.GetRows(r);
                        string error = ExceptionBuilder.UniqueConstraintViolationText(_key.ColumnsReference, (object[])uniqueKeys[i]);
                        for (int j = 0; j < rows.Length; j++)
                        {
                            rows[j].RowError = error;
                            foreach (DataColumn dataColumn in _key.ColumnsReference)
                            {
                                rows[j].SetColumnError(dataColumn, error);
                            }
                        }
                        result = true;
                    }
                }
            }
            return result;
        }