Determine if collection is of type IEnumerable

Question

How to determine if object is of type IEnumerable ?

Code:

namespace NS {
    class Program {
        static IEnumerable GetInts()         


        

Answer 1

You can use the is keyword.

[TestFixture]
class Program
{
    static IEnumerable<int> GetInts()
    {
        yield return 1;
    }

    [Test]
    static void Maasd()
    {
        var i = GetInts();
        Assert.IsTrue(i is IEnumerable<int>);
    }
}

Answer 2

Same technique as Marc's answer, but Linqier:

namespace NS
{
    class Program
    {
        static IEnumerable<int> GetInts()
        {
            yield return 1;
        }

        static void Main()
        {
            var i = GetInts();
            var type = i.GetType();
            var isEnumerableOfT = type.GetInterfaces()
                .Any(ti => ti.IsGenericType
                     && ti.GetGenericTypeDefinition() == typeof(IEnumerable<>));
            Console.WriteLine(isEnumerableOfT);
        }
    }
}

Answer 3

Try

type.GetInterface("IEnumerable") != null && type.IsGenericType