standards-c-sharp

When to write an extension method

Make an extension method only when at least one of the following is true:

• Your operation is very general
• To promote SRP
• To hide advanced functionality
• You don’t have control of the code you wish to extend
• To avoid heavy breaking changes

Unless your use case falls into one of the above then do not write an extension method. Create a standard method on the interface / class itself.

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