asp.net mvc - C# data model, are there any differences between using these form? -

i'm going build mvc web application , created data models.
found online many ways compile data model code. easiest one, using public properties:

public class person {     public int id { get; set; }     public string firstname { get; set; }     public string lastname { get; set; } } 

but found version using private variable , public properies, this:

public class person {     private int id;     private string firstname;     private string lastname;      public int id { { return id; } set { id = value; } }     public string firstname { { return firstname; } set { firstname = value; } }     public string lastname { { return lastname; } set { lastname = value; } } } 

what difference between these 2 data models? when more advisable using first 1 or second one?

this same asking: difference bwteen auto properties , normal properties.

auto properties:

• easy creation (less type)
• internal field generated automatically compiler
• not possible debug (set break point inside property)

normal properties

• sligtly more code type
• easy debug
• more code can injected inside get , set