How do I specify multiple constraints on a generic type in C#?

Question

What is the syntax for placing constraints on multiple types? The basic example:

class Animal<SpeciesType> where SpeciesType : Species

I would like to place constraints on both types in the following definition such that SpeciesType must inherit from Species and OrderType must inherit from Order:

class Animal<SpeciesType, OrderType>

Darren Kopp · Accepted Answer · 2011-02-01 20:21:21Z

60

public class Animal<SpeciesType,OrderType>
    where SpeciesType : Species
    where OrderType : Order
{
}

edited Feb 1, 2011 at 20:21

answered Sep 5, 2008 at 17:46

Darren Kopp

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1 Comment

Ben Pretorius Over a year ago

Thanks! i always forget this if I do not write it often!

Igor Kustov · Accepted Answer · 2014-04-04 11:05:21Z

18

You should be able to go :

class Animal<SpeciesType, OrderType>
    where SpeciesType : Species
    where OrderType : Order {
}

edited Apr 4, 2014 at 11:05

Igor Kustov

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answered Sep 5, 2008 at 17:48

Ryan Lanciaux

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