将两个列不同的DataTable合并成一个新的DataTable

/// <summary>
        /// 将两个列不同(结构不同)的DataTable合并成一个新的DataTable
        /// </summary>
        /// <param name="DataTable1">表1</param>
        /// <param name="DataTable2">表2</param>
        /// <returns>合并后的新表</returns>
        private DataTable UniteDataTable(DataTable DataTable1, DataTable DataTable2)
        {
            //克隆DataTable1的结构
            DataTable newDataTable = DataTable1.Clone();
            for (int i = 0; i < DataTable2.Columns.Count; i++)
            {
                //再向新表中加入DataTable2的列结构
                newDataTable.Columns.Add(DataTable2.Columns[i].ColumnName);
            }
            object[] obj = new object[newDataTable.Columns.Count];
            //添加DataTable1的数据
            for (int i = 0; i < DataTable1.Rows.Count; i++)
            {
                DataTable1.Rows[i].ItemArray.CopyTo(obj, 0);
                newDataTable.Rows.Add(obj);
            }

if (DataTable1.Rows.Count >= DataTable2.Rows.Count)
            {
                for (int i = 0; i < DataTable2.Rows.Count; i++)
                {
                    for (int j = 0; j < DataTable2.Columns.Count; j++)
                    {
                        newDataTable.Rows[i][j + DataTable1.Columns.Count] = DataTable2.Rows[i][j].ToString();
                    }
                }
            }
            else
            {
                DataRow dr3;
                //向新表中添加多出的几行
                for (int i = 0; i < DataTable2.Rows.Count - DataTable1.Rows.Count; i++)
                {
                    dr3 = newDataTable.NewRow();
                    newDataTable.Rows.Add(dr3);
                }
                for (int i = 0; i < DataTable2.Rows.Count; i++)
                {
                    for (int j = 0; j < DataTable2.Columns.Count; j++)
                    {
                        newDataTable.Rows[i][j + DataTable1.Columns.Count] = DataTable2.Rows[i][j].ToString();
                    }
                }
            }
            return newDataTable;
        }
        #endregion