Как преобразовать дату из DateTimePicker, чтобы записать в БД

public bool AddNewDebitor(string ID_client, string Name, string PassportNumber, string Issued,
            DateTime DateIssue, string INN, string PlaceLiving, string PlaceFactLiving, string AddressWork,
            string PhoneNumber, string Ocupation, string ForNote)
        {
            bool flagResult = false;
            
 
            string query = string.Format("INSERT INTO Clients"+
                "([ID_client], [Name], [PassportNumber] , [Issued],[DateIssue],  [INN], [PlaceLiving], [PlaceFactLiving], [AddressWork], [PhoneNumber], [Ocupation], [ForNote])" +
                "VALUES('{0}', '{1}', '{2}', '{3}', '{4}', '{5}', '{6}', '{7}', '{8}', '{9}', '{10}','{11}' )",
                ID_client, Name, PassportNumber, Issued,DateIssue, INN, PlaceLiving, PlaceFactLiving, AddressWork, PhoneNumber, Ocupation, (ForNote != String.Empty) ? ForNote : null);
 
            
            using (SqlConnection con = new SqlConnection(ConectionString))
            {
                SqlCommand com = new SqlCommand(query, con);
                try
                {
                    con.Open();
                    if (com.ExecuteNonQuery() == 1)
                        flagResult = true;
                }
                catch
                {
 
                }
 
            }
 
 
 
            return flagResult;
        }

 string query = string.Format("INSERT INTO Clients"+
                "([ID_client], [Name], [PassportNumber] , [Issued],[DateIssue],  [INN], [PlaceLiving], [PlaceFactLiving], [AddressWork], [PhoneNumber], [Ocupation], [ForNote])" +
                "VALUES('{0}', '{1}', '{2}', '{3}', @date_issue, '{5}', '{6}', '{7}', '{8}', '{9}', '{10}','{11}' )",
                ID_client, Name, PassportNumber, Issued, INN, PlaceLiving, PlaceFactLiving, AddressWork, PhoneNumber, Ocupation, (ForNote != String.Empty) ? ForNote : null);
//..
com.Parameters.AddWithValue("@date_issue", DateIssue);