What is Dependency Injection?
What is Dependency Injection
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Dependency Injection (DI) is a design pattern that removes the dependency from the programming code so that it can be easy to manage and test the application.
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Dependency Injection makes our programming code loosely coupled
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DI is a concept of injecting anobject into a class rather than explicitly creating object in a class, since IoC container injects object into class during runtime
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Example:Standard code without Dependency Injection
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public class TextEditor
{
private SpellChecker spellChecker;
public TextEditor()
{
spellChecker = new SpellChecker();
}
}
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Example:Code with Dependency Injection
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public class TextEditor
{
private SpellChecker spellChecker;
public TextEditor(SpellChecker spellChecker)
{
this.spellChecker = spellChecker;
}
}
