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Note that the Catel team recommends using constructor injection over property injection because it allows . Property injection looks like a silver bullet, but is very tricky because:

1) It does not allow you to check for null values and store dependencies in private fields (when)?

2) Dependency Injection is just a technique. When using a constructor, you can force a user to provide the value. With property injection, you can only hope that the user will set them for you