Efficient way to join strings with a separator?

Question

foreach (SessionTeacher sessionTeacher in sessionTeachers)
{
   Person person = EMS.PWDAL.DALHelper.GetPersonByID(sessionTeacher.PersonID);
   ltrlSpeakers.Text += person.Name1 + ", ";
}

here ltrlSpeakers.Text will have something like this "abc, def, " that is extra comma and space at the end which I have to remove.

// removing extra comma and space

ltrlSpeakers.Text = ltrlSpeakers.Text.ToString().Remove(ltrlSpeakers.Text.ToString().Length - 2, 2);

it's working fine but is there a better more efficient simple way?

Answer 1

Something like this:

var personNames = sessionTeachers.Select(
      st => EMS.PWDAL.DALHelper.GetPersonByID(st.PersonID).Name1);
ltrlSpeakers.Text = string.Join(", ", personNames);