What is Inversion of Control (loC)

The Inversion of Control (and also Dependency Injection) patterns concerned with removing dependencies from your code.

public class TextEditor

{

private SpellChecker checker;

public TextEditor()

{

checker = new SpellChecker();

}

}

In the above code sample we have created a dependency between the TextEditor and the SpellChecker. in an ioC scenario we would instead do something like this.

public class TextEditor

{

private ISpellChecker checker;

public TextEditor(ISpellChecker checker)

{

this.checker=checker;

}

}

Now, the client creating the TextEditor class has the total control over which SpellChecker implementation to use. We're injecting the TextEditor with the dependency.