How can I send generic list<T> in the body of outlook mail

Question

I am using C# for my problem.
I have an Excel file which has many worksheets. From "Fisrt Sheet", I am looking for a character "x" which will be present in some cells of a specific column (occurence of "x" will be in one specific column only, in different cells of that column). I am looking for "x" and extracting the corresponding row's details in a generic list (with naming the headers of extracted field). Now, I have to send this generic list<t> in "tabular format" in body of the mail via Outlook.
I am stuck with sending of list in tabular format in the mail body.

Please help me with my problem

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Data;
using Excel = Microsoft.Office.Interop.Excel;
using Outlook = Microsoft.Office.Interop.Outlook;

namespace xlsm
{
    class New
    {
        static void Main(sting[] args)
        {
        sting st;
            long rCnt, cCnt;
            long rows = 0, columns = 0;

            Excel.Application xlApp;
            Excel.Workbook xlWorkBook;
            Excel.Worksheet xlWorkSheet;
            Excel.Range rng;

            xlApp = new Excel.Application();
            xlWorkBook = xlApp.Workbooks.Open(@"F:\Doc_Excel", 0, true, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
            xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets["First Sheet"];


            rng = xlWorkSheet.UsedRange;
            rows = rng.Rows.Count;
            columns = rng.Columns.Count;

            List<Memo> lst = new List<Memo>();

            for (rCnt = 1; rCnt < rows; rCnt++)
            {
                for (cCnt = 1; cCnt < columns; cCnt++)
                {

                    if ((rng.Cells[rCnt, cCnt] as Excel.rng).Value2 != null)
                    {
                        st = (rng.Cells[rCnt, cCnt] as Excel.rng).Value2.Tosting();
                        if (st == "x")
                        {
                            Memo ms = new Memo();

                            ms.MemoName = (rng.Cells[rCnt, 1] as Excel.rng).Value2.Tosting();
                            ms.Type = (rng.Cells[rCnt, 2] as Excel.rng).Value2.Tosting();
                            ms.Ext = (rng.Cells[rCnt, 3] as Excel.rng).Value2.Tosting();
                            ms.Seller = (rng.Cells[rCnt, 4] as Excel.rng).Value2.Tosting();
                            ms.Warehouse = (rng.Cells[rCnt, 5] as Excel.rng).Value2.Tosting();
                            lst.Add(ms);

                        }
                    }

                }
            }

            try
            {

                Outlook.Application oApp = new Outlook.Application();
                Outlook.MailItem oMsg = (Outlook.MailItem)oApp.CreateItem(Outlook.OlItemType.olMailItem);
                oMsg.HTMLBody = "";
                oMsg.Subject = "Memo contents as required.";
                Outlook.Recipients oRecims = (Outlook.Recipients)oMsg.Recipients;
                Outlook.Recipient oRecip = (Outlook.Recipient)oRecims.Add("[email protected]");
                oRecip.Resolve();
                oMsg.Send();

                oRecip = null;
                oRecims = null;
                oMsg = null;
                oApp = null;
            }
            catch (Exception ex)
            {
            }
            xlWorkBook.close(true, null, null);
            xlApp.Quit();

            Marshal.ReleaseComObject(xlWorkSheet);
            Marshal.ReleaseComObject(xlWorkBook);
            Marshal.ReleaseComObject(xlApp);
        }

    }
    public class Memo
    {
        public string MemoName { get; set; }
        public string Type { get; set; }
        public string Ext { get; set; }
        public string Seller { get; set; }
        public string Warehouse { get; set; }
    }