C# `using`

MSDN - using Statement (C# Reference)

축약형일 뿐이다.

class CA : IDisposable
{
    public void DoSomething() { }
    public void Dispose() { }
}

class CB
{
    void Method()
    {
        using (CA a = new CA())
        {
            a.DoSomething()
        }
    }
}

위 코드는 다음과 같이 확장된다.

class CA : IDisposable
{
    public void DoSomething() { }
    public void Dispose() { }
}

class CB
{
    void Method()
    {
        {
            CA a = new CA();
            try
            {
                a.DoSomething()
            }
            finally
            {
                if (a != null)
                    ((IDisposable)a).Dispose();
            }
        }
    }
}

당연히 using 안에 들어가는 녀석은 IDisposable을 구현해야만 한다.

-- 2010-07-28

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C# using

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C# `using`