In a class, what is the difference between instance variable and variable without modifier in c#

In the following code:

public class Foo
{
  private object first;  

  object second;

  public void Bar()
  {
    first = "1234";

    second = "1234";
  }
}

What is the difference between two declaration? I'm new to OOP and was wondering what would be the difference...

Thanks

Jon Skeet
people
quotationmark

What is the difference between two declaration?

Nothing, as this is C#. In general, if you declare anything in C# without using access modifiers, it's equivalent to using the most private valid access modifier for that place1.

So yes, declaring

private object first;

is equivalent to

object first;

Personally, I prefer being explicit about access modifiers - others prefer to be as terse as possible.

1 The one exception to this is specifying an access modifier for part of a property. That has to be more private than the property itself; if you don't specify an access modifier there, it's implicitly the same access as the property itself.

people

See more on this question at Stackoverflow