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

        internal override bool CanBeRemovedFromCollection(ConstraintCollection constraints, bool fThrowException)
        {
            if (Equals(constraints.Table._primaryKey))
            {
                Debug.Assert(constraints.Table._primaryKey == this, "If the primary key and this are 'Equal', they should also be '=='");
                if (!fThrowException)
                    return false;
                else
                    throw ExceptionBuilder.RemovePrimaryKey(constraints.Table);
            }
            for (ParentForeignKeyConstraintEnumerator cs = new ParentForeignKeyConstraintEnumerator(Table.DataSet, Table); cs.GetNext();)
            {
                ForeignKeyConstraint constraint = cs.GetForeignKeyConstraint();
                if (!_key.ColumnsEqual(constraint.ParentKey))
                    continue;

                if (!fThrowException)
                    return false;
                else
                    throw ExceptionBuilder.NeededForForeignKeyConstraint(this, constraint);
            }

            return true;
        }