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Editorial Team
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Asked: 2026-05-12T17:37:50+00:00

I have recently started to make useful use of C# extension methods. The SO

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I have recently started to make useful use of C# extension methods. The SO examples and the documentation suggest that they are only used for instance methods (i.e. with the this keyword). It is possible to use them (or another approach) with static/class methods?

(My particular requirement is converting Java code to C# where “most of the code” does not need editing. The Java instance methods (e.g. Java String.indexOf()) can be routed through an extension method calling C# string.IndexOf()). I would like to do the same for, say, Java Math.abs() => C# Math.Abs()).

SUMMARY No. The answers suggest it would be a reasonable thing to have but it’s unlikely to happen soon. Workarounds will require editing creating new classes or something similar and may not be worth it.

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1 Answer

  1. Editorial Team

    You cannot create static extension methods – it’s also something I’ve wished to be able to do!

    You could create your own static classes with a standard suffix, i.e. MathJSyntax.abs(..) which would call Math.Abs(..)

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