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 The Unity Application Block (Unity) is a lightweight, extensible dependency injection container. It facilitates building loosely coupled applications and provides developers with the following advantages: 
 
- simplified object creation, especially for hierarchical object structures and dependencies.
  
- abstraction of requirements; this allows developers to specify dependencies at run time or in configuration and simplify management of crosscutting concerns.
  
- increased flexibility by deferring component configuration to the container.
  
- service location capability; this allows clients to store or cache the container.
 
  
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