Question

I am going through a tutorial on MVC – Linq to SQL. Here, I noticed they are using underscore in object names (first character in object name) such as “_dataContext”

Here is the code:

using System.Collections.Generic;
using System.Linq;

namespace MvcApplication1.Models
{
         public class MovieRepository : IMovieRepository
         {
              private MovieDataContext _dataContext;

              public MovieRepository()
              {
                    _dataContext = new MovieDataContext();
              }

              #region IMovieRepository Members

              public IList<Movie> ListAll()
              {
                   var movies = from m in _dataContext.Movies
                        select m;
                   return movies.ToList();
              }

              #endregion
         }
     }

My questions is, what is the purpose of using this underscore?

Answer 1

My questions is, what is the purpose of using this underscore?

No technical purpose. This is merely a convention used by some people to designate private fields. It is completely optional, and merely a style choice.