System.Data.DataSet.GetChanges C# (CSharp) Method

        public DataSet GetChanges(DataRowState rowStates)
        {
            long logScopeId = DataCommonEventSource.Log.EnterScope("<ds.DataSet.GetChanges|API> {0}, rowStates={1}", ObjectID, rowStates);
            try
            {
                DataSet dsNew = null;
                bool fEnforceConstraints = false;
                if (0 != (rowStates & ~(DataRowState.Added | DataRowState.Deleted | DataRowState.Modified | DataRowState.Unchanged)))
                {
                    throw ExceptionBuilder.InvalidRowState(rowStates);
                }

                // Initialize all the individual table bitmaps.
                TableChanges[] bitMatrix = new TableChanges[Tables.Count];
                for (int i = 0; i < bitMatrix.Length; ++i)
                {
                    bitMatrix[i] = new TableChanges(Tables[i].Rows.Count);
                }

                // find all the modified rows and their parents
                MarkModifiedRows(bitMatrix, rowStates);

                // copy the changes to a cloned table
                for (int i = 0; i < bitMatrix.Length; ++i)
                {
                    Debug.Assert(0 <= bitMatrix[i].HasChanges, "negative change count");
                    if (0 < bitMatrix[i].HasChanges)
                    {
                        if (null == dsNew)
                        {
                            dsNew = Clone();
                            fEnforceConstraints = dsNew.EnforceConstraints;
                            dsNew.EnforceConstraints = false;
                        }

                        DataTable table = Tables[i];
                        DataTable destTable = dsNew.Tables[table.TableName, table.Namespace];
                        Debug.Assert(bitMatrix[i].HasChanges <= table.Rows.Count, "to many changes");

                        for (int j = 0; 0 < bitMatrix[i].HasChanges; ++j)
                        {
                            // Loop through the rows.
                            if (bitMatrix[i][j])
                            {
                                table.CopyRow(destTable, table.Rows[j]);
                                bitMatrix[i].HasChanges--;
                            }
                        }
                    }
                }

                if (null != dsNew)
                {
                    dsNew.EnforceConstraints = fEnforceConstraints;
                }
                return dsNew;
            }
            finally
            {
                DataCommonEventSource.Log.ExitScope(logScopeId);
            }
        }

 /// <summary>
 /// Проверяет наличие ошибок в записях
 /// </summary>
 /// <param name="dataSet">проверяемый DataSet</param>
 /// <returns></returns>
 internal static bool HaveDataError(DataSet dataSet)
 {
     DataSet ds = dataSet.GetChanges();
     if (ds == null) return false;
     if (!ds.HasErrors) return false;
     return true;
 }