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    <p>First of all, "IoC" means "<a href="http://en.wikipedia.org/wiki/Inversion_of_control" rel="nofollow noreferrer">inversion of control</a>" and it is a <em>concept</em> (not a concrete software component) that is highly related to <em><a href="http://en.wikipedia.org/wiki/Dependency_injection" rel="nofollow noreferrer">dependency injection</a></em>. The <em>container</em> (which <em>is</em> a software component) is a <em>dependency injection container</em>. So not only are "IoC" and "container" two entities that cannot be compared, they are also inside the same "camp" so to speak.</p> <p>Therefore the question could better be phrased as "should I use a DI container for my application?".</p> <p>There are several DI containers you can choose from: Microsoft Unity, Castle Windsor and NInject are a few of the more well-known ones (I was unaware of Autofac until now). Pick one and go ahead with it; there will be no practical difference in your case and you can always switch relatively easily to another one if the need arises.</p> <p>Further, a major selling point of containers is that <em>you do not need</em> to wire them up to construct classes with deep dependency trees. The container resolves and injects the dependencies automatically; you only need to help if you need object construction to happen with specific values passed to a constructor.</p> <p>Finally, there is no relation between a DI container and the command pattern or anything like that. If you want to get the active document, then simply store what the active document is in a variable whenever it changes and read that variable when you need. The container does not come into it at all.</p> <p><strong>Update:</strong> Adding a link to the highly relevant question <a href="https://stackoverflow.com/q/21288/50079">Which .NET Dependency Injection frameworks are worth looking into?</a></p>
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    1. POService Container or IoC for WinForms suggestions
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    1. COThanks for the answer, is there a good example of a text editor written using DI techniques thats simple? I looked at SharpDevelop but its too complex to pull apart.
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    2. CO@SophieCrystalTaylor: I don't think there's a good example of a *text editor* using DI anywhere. The people who understand DI do not need such an example, and the people who do not are better served by more introductory examples; there is no need to bring text editing into it. Decide on a container and read the tutorials for it.
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