Convert HTML Table to DataSet in Asp.Net

private DataSet ConvertHTMLTablesToDataSet(string HTML)

    {

        // Declarations 

        DataSet ds = new DataSet();

        DataTable dt = null;

        DataRow dr = null;

        DataColumn dc = null;

        string TableExpression = "<table[^>]*>(.*?)</table>";

        string HeaderExpression = "<th[^>]*>(.*?)</th>";

        string RowExpression = "<tr[^>]*>(.*?)</tr>";

        string ColumnExpression = "<td[^>]*>(.*?)</td>";

        bool HeadersExist = false;

        int iCurrentColumn = 0;

        int iCurrentRow = 0;

        // Get a match for all the tables in the HTML 

        MatchCollection Tables = Regex.Matches(HTML, TableExpression, RegexOptions.Multiline | RegexOptions.Singleline | RegexOptions.IgnoreCase);

        // Loop through each table element 

        foreach (Match Table in Tables)

        {

            // Reset the current row counter and the header flag 

            iCurrentRow = 0;

            HeadersExist = false;

            // Add a new table to the DataSet 

            dt = new DataTable();

            //Create the relevant amount of columns for this table (use the headers if they exist, otherwise use default names) 

            if (Table.Value.Contains("<th"))

            {

                // Set the HeadersExist flag 

                HeadersExist = true;

                // Get a match for all the rows in the table 

                MatchCollection Headers = Regex.Matches(Table.Value, HeaderExpression, RegexOptions.Multiline | RegexOptions.Singleline | RegexOptions.IgnoreCase);

                // Loop through each header element 

                foreach (Match Header in Headers)

                {

                    dt.Columns.Add(Header.Groups[1].ToString());

                }

            }

            else

            {

                for (int iColumns = 1; iColumns <= Regex.Matches(Regex.Matches(Regex.Matches(Table.Value, TableExpression, RegexOptions.Multiline | RegexOptions.Singleline | RegexOptions.IgnoreCase)[0].ToString(), RowExpression, RegexOptions.Multiline | RegexOptions.Singleline | RegexOptions.IgnoreCase)[0].ToString(), ColumnExpression, RegexOptions.Multiline | RegexOptions.Singleline | RegexOptions.IgnoreCase).Count; iColumns++)

                {

                    dt.Columns.Add("Column " + iColumns);

                }

            }

            //Get a match for all the rows in the table 

            MatchCollection Rows = Regex.Matches(Table.Value, RowExpression, RegexOptions.Multiline | RegexOptions.Singleline | RegexOptions.IgnoreCase);

            // Loop through each row element 

            foreach (Match Row in Rows)

            {

                // Only loop through the row if it isn't a header row 

                if (!(iCurrentRow == 0 && HeadersExist))

                {

                    // Create a new row and reset the current column counter 

                    dr = dt.NewRow();

                    iCurrentColumn = 0;

                    // Get a match for all the columns in the row 

                    MatchCollection Columns = Regex.Matches(Row.Value, ColumnExpression, RegexOptions.Multiline | RegexOptions.Singleline | RegexOptions.IgnoreCase);

                    // Loop through each column element 

                    foreach (Match Column in Columns)

                    {

                        // Add the value to the DataRow 

                        dr[iCurrentColumn] = Column.Groups[1].ToString();

                        // Increase the current column  

                        iCurrentColumn++;

                    }

                    // Add the DataRow to the DataTable 

                    dt.Rows.Add(dr);

                }

                // Increase the current row counter 

                iCurrentRow++;

            }

            // Add the DataTable to the DataSet 

            ds.Tables.Add(dt);

        }

        return ds;

    }