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Dependency Injection, is a design pattern where dependencies (instances of objects, properties) of a component are set through the constructor(s), methods or fields (properties). It is a special form of the more general dependency inversion.

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Singletons pattern generally refers to a single global instance. I.e. a static property in c#. Most of the problems with this is related to the "global" part, or more specifically, the combination of …
answered Jul 9 by user104903
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It is not necessary to use interfaces to use DI. The primary purpose of DI is to separate construction and usage of objects. Using singletons is rightly frowned upon in most cases. One of the reason …
answered Jul 1 by user104903