System.Data.Constraint.Clone C# (CSharp) Méthode

        internal abstract Constraint Clone(DataSet destination);
        internal abstract Constraint Clone(DataSet destination, bool ignoreNSforTableLookup);

        private void MergeConstraints(DataTable table)
        {
            Debug.Assert(_dataSet != null);

            // Merge constraints
            for (int i = 0; i < table.Constraints.Count; i++)
            {
                Constraint src  = table.Constraints[i];
                Constraint?dest = src.Clone(_dataSet, _IgnoreNSforTableLookup);

                if (dest == null)
                {
                    _dataSet.RaiseMergeFailed(table,
                                              SR.Format(SR.DataMerge_MissingConstraint, src.GetType().FullName, src.ConstraintName),
                                              _missingSchemaAction
                                              );
                }
                else
                {
                    Constraint?cons = dest.Table !.Constraints.FindConstraint(dest);
                    if (cons == null)
                    {
                        if (MissingSchemaAction.Add == _missingSchemaAction)
                        {
                            try
                            {
                                // try to keep the original name
                                dest.Table.Constraints.Add(dest);
                            }
                            catch (DuplicateNameException)
                            {
                                // if fail, assume default name
                                dest.ConstraintName = string.Empty;
                                dest.Table.Constraints.Add(dest);
                            }
                        }
                        else if (MissingSchemaAction.Error == _missingSchemaAction)
                        {
                            _dataSet.RaiseMergeFailed(table,
                                                      SR.Format(SR.DataMerge_MissingConstraint, src.GetType().FullName, src.ConstraintName),
                                                      _missingSchemaAction
                                                      );
                        }
                    }
                    else
                    {
                        MergeExtendedProperties(src.ExtendedProperties, cons.ExtendedProperties);
                    }
                }
            }
        }