CODEWITHSUNDEEP
c#.netreflection
mharti
mharti

Reputation: 300

List<int> is not a subclass of 'IEnumerable'

I want to determine some object is derived from IEnumerable, but Reflection says List<int> is not a subclass of IEnumerable.

https://dotnetfiddle.net/an1n62

var a = new List<int>();

// true
Console.WriteLine(a is IEnumerable);

// falsa
Console.WriteLine(a.GetType().IsSubclassOf(typeof(IEnumerable)));
Console.WriteLine(a.GetType().IsSubclassOf(typeof(IEnumerable<>)));
Console.WriteLine(a.GetType().IsSubclassOf(typeof(IEnumerable<int>)));

is keyword works find, but I have to sovle this without the keyword.

Upvotes: 0

Views: 280

Answers (1)

Paolo Tedesco
Paolo Tedesco

Reputation: 57172

To do what you want, you need to use IsAssignableFrom:

typeof(IEnumerable).IsAssignableFrom(a.GetType())

The documentation for IsSubclassOf explicitly states this:

The IsSubclassOf method cannot be used to determine whether an interface derives from another interface, or whether a class implements an interface. Use the IsAssignableFrom method for that purpose.

Upvotes: 3

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