System.Data.DataTable.SerializeConstraints C# (CSharp) Method

        internal void SerializeConstraints(SerializationInfo info, StreamingContext context, int serIndex, bool allConstraints)
        {
            if (allConstraints)
            {
                Debug.Assert(DataSet != null);
            }

            ArrayList constraintList = new ArrayList();

            for (int i = 0; i < Constraints.Count; i++)
            {
                Constraint c = Constraints[i];

                UniqueConstraint uc = c as UniqueConstraint;
                if (uc != null)
                {
                    int[] colInfo = new int[uc.Columns.Length];
                    for (int j = 0; j < colInfo.Length; j++)
                    {
                        colInfo[j] = uc.Columns[j].Ordinal;
                    }

                    ArrayList list = new ArrayList();
                    list.Add("U");
                    list.Add(uc.ConstraintName);
                    list.Add(colInfo);
                    list.Add(uc.IsPrimaryKey);
                    list.Add(uc.ExtendedProperties);

                    constraintList.Add(list);
                }
                else
                {
                    ForeignKeyConstraint fk = c as ForeignKeyConstraint;
                    Debug.Assert(fk != null);
                    bool shouldSerialize = (allConstraints == true) || (fk.Table == this && fk.RelatedTable == this);

                    if (shouldSerialize)
                    {
                        int[] parentInfo = new int[fk.RelatedColumns.Length + 1];
                        parentInfo[0] = allConstraints ? DataSet.Tables.IndexOf(fk.RelatedTable) : 0;
                        for (int j = 1; j < parentInfo.Length; j++)
                        {
                            parentInfo[j] = fk.RelatedColumns[j - 1].Ordinal;
                        }

                        int[] childInfo = new int[fk.Columns.Length + 1];
                        childInfo[0] = allConstraints ? DataSet.Tables.IndexOf(fk.Table) : 0;   //Since the constraint is on the current table, this is the child table.
                        for (int j = 1; j < childInfo.Length; j++)
                        {
                            childInfo[j] = fk.Columns[j - 1].Ordinal;
                        }

                        ArrayList list = new ArrayList();
                        list.Add("F");
                        list.Add(fk.ConstraintName);
                        list.Add(parentInfo);
                        list.Add(childInfo);
                        list.Add(new int[] { (int)fk.AcceptRejectRule, (int)fk.UpdateRule, (int)fk.DeleteRule });
                        list.Add(fk.ExtendedProperties);

                        constraintList.Add(list);
                    }
                }
            }
            info.AddValue(string.Format(CultureInfo.InvariantCulture, "DataTable_{0}.Constraints", serIndex), constraintList);
        }