C# Generics: Enum constraints are not allowed, Why? [duplicate]

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Enum type constraints in C#

Could somebody kindly explain to me with a simple sample and simple words why enum constraints are not allowed on a generic type i.e. What would happen if they were possible?

An enum is a value type, there aren't many constraints you could apply to a value type. (only struct and new() comes to mind) — Jeff Mercado
– Jeff Mercado, Commented Jun 8, 2011 at 22:47
Take a look at this: msmvps.com/blogs/jon_skeet/archive/2009/09/10/… — eulerfx
– eulerfx, Commented Jun 8, 2011 at 22:53
Wanted something very simple and got it. thanks mates :-) — Idrees
– Idrees, Commented Jun 8, 2011 at 22:53

Ed Swangren · Accepted Answer · 2011-06-08 22:49:34Z

Simply put: because they're not. That's how the language is designed (you wanted simple, right? :) )

enum is a value type, so you could put a restraint on your generic type where T : struct and use Type.IsEnum to check in the constructor, throwing an exception if it returns false.

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