When to use get; set; in c#

Question

I\'m failing to understand what the difference is between initializing a variable, getting its value like this:

 //define a local variable.
   int i;

   i=          


        

Answer 1

public int i {get ; set;}

creates auto property i of type int

which is short for

private int _i;
public int i
{
     get{ return _i;}
     set{ _i = i}
}