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

        private DataTable IncrementalCloneTo(DataTable sourceTable, DataTable targetTable)
        {
            foreach (DataColumn dc in sourceTable.Columns)
            {
                if (targetTable.Columns[dc.ColumnName] == null)
                {
                    targetTable.Columns.Add(dc.Clone());
                }
            }

            return targetTable;
        }