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copied!<p>Calling a method on a disposed object will throw <code>ObjectDisposedException</code>. E.g.:</p> <pre><code>var textWriter = Console.Error; textWriter.Dispose(); textWriter.WriteLine("Test"); </code></pre> <p>The last line should throw an exception. Except it doesn't always to that.</p> <p>If you peruse the BCL source code you can see that <code>Console</code> either uses a <code>StreamWriter</code> (really a synchronized stream writer) that is hooked up to either a "real" stream (e.g. the console error stream) or if that is not available to <code>StreamWriter.Null</code>.</p> <p>The "real" <code>StreamWriter</code> is constructed in a special way so that it is not closeable. This means that even if you close it (or dispose it) it just continues to function as expected.</p> <p>So if you have a "real" console stream you can close <code>Console.Error</code> as many times as you want without closing the underlying stream. Also you wont get any <code>ObjectDisposedException</code>.</p> <p>If there is no "real" stream attached to <code>Console.Error</code> closing the <code>StreamWriter</code> will close the underlying stream (in this case <code>Stream.Null</code>) which doesn't exhibit the special non-closeable behavior, and if you try to use the <code>StreamWriter</code> later you will get an <code>ObjectDisposedException</code>.</p> <p><strong>The bottom line is that you can get a <code>ObjectDisposedException</code> if you close a console stream writer prematurely in an application that doesn't have a real console stream.</strong></p> <p>The information above also applies to <code>Console.Out</code>.</p>

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