Using keyword causes object to go out of scope

Question

Why does the the object ok go out of scope when used in the if statement? and how can I dispose of object ok?

public class hello : IDisposable { 

}

public class hi{

    private void b() 
    {
        using(hello ok = new hello());

        hello no = new hello();

        if( ok == no )
        {
            ok = no;
        }
    }
}

object ok will be disposed after `using` scope read here http://msdn.microsoft.com/en-us/library/yh598w02.aspx but you need to put `{` brackets to define scope and implement IDisposable — Kamil Budziewski, Sep 20 '13 at 12:47
Encase everything after the using statement in {}. eg - using(var a = new b()){if (a == 1)a = 2;}; — Steven Wood, Sep 20 '13 at 12:48

musefan · Accepted Answer · 2013-09-20T13:01:18.680

You are not using the using statement correctly, what you want is as follows:

using(hello ok = new hello())
{
    hello no = new hello();

    if( ok == no )//Point 1
    {
        ok = no;//Point 2
    }
}//Point 3

Some points (as found in comments above):

This will never be true, because you have two difference instances. Unless, the class has overridden the equality operator
This is not valid and will not compile, you cannot re-assign a variable used in a using statement
Here ok will go out of scope, it will also be disposed at this point, assuming it implements IDisposible - I think that it will not compile if it doesn't implement IDisposable anyway

Overall, what you are seemingly trying to do doesn't make much sense at all.

Using keyword causes object to go out of scope

1 Answers1