How to determine if a type is a type of collection?

Question

I am trying to determine if a runtime type is some sort of collection type. What I have below works, but it seems strange that I have to name the types that I believe to be coll

Answer 1

Really all of these types inherit IEnumerable. You can check only for it:

bool IsEnumerableType(Type type)
{
    return (type.GetInterface(nameof(IEnumerable)) != null);
}

or if you really need to check for ICollection:

bool IsCollectionType(Type type)
{
    return (type.GetInterface(nameof(ICollection)) != null);
}

Look at "Syntax" part:

• List

• IList

• ICollection