How to get subject line from database using outlook = microsoft.office.interop.outlook;

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C#

WinForms

Outlook

SQLite

I am using SQLite database and outlook = Microsoft.Office.Interop.Outlook; to send email to user.
How can I get a textbox data into the subject line from my database?

private void txt_Mail_Bot_Click(object sender, EventArgs e)
         {
             try
             {
                 List<string> lstAllRecipients = new List<string>();
                 //Below is hardcoded - can be replaced with db data
                 lstAllRecipients.Add("email@.COM");
                 //  lstAllRecipients.Add("email@.COM ");

                 outlook.Application outlookApp = new outlook.Application();
                 outlook._MailItem oMailItem = (outlook._MailItem)outlookApp.CreateItem(outlook.OlItemType.olMailItem);
                 outlook.Inspector oInspector = oMailItem.GetInspector;
                 // Thread.Sleep(10000);

                 // Recipient
                 outlook.Recipients oRecips = (outlook.Recipients)oMailItem.Recipients;
                 foreach (String recipient in lstAllRecipients)
                 {
                     outlook.Recipient oRecip = (outlook.Recipient)oRecips.Add(recipient);
                     oRecip.Resolve();
                 }

                 //Add CC
                 outlook.Recipient oCCRecip = oRecips.Add("DifferntEmail@.com");
                 oCCRecip.Type = (int)outlook.OlMailRecipientType.olCC;
                 oCCRecip.Resolve();

                 //Add Subject
                 oMailItem.Subject = " Issue here Need to get info from Data Base Here";

                 // body, bcc etc...

                 oMailItem.Body = "This is Body Info no problem here.";

                 // body, bcc etc...

                 //Display the mailbox
                 oMailItem.Display(true);
             }
             catch (Exception objEx)
             {
                 //   Response.Write(objEx.ToString());

             }
         }
     }
 }

What I have tried:

Html code no avail I cant find a info to lead me in the correct direction.