How to check if a variable is an IEnumerable of some sort

Question

basically I\'m building a very generic T4 template and one of the things I need it to do is say print variable.ToString(). However, I want it to evaluate lists and

Answer 1

Well, somewhat simple but... if you only have:

using System.Collections.Generic;

you might need to add:

using System.Collections;

The former defines IEnumerable<T> and latter defines IEnumerable.

Answer 2

This is an old question, but I wanted to show an alternative method for determining if a SomeType is IEnumerable:

var isEnumerable = (typeof(SomeType).Name == "IEnumerable`1");

Answer 3

If you want to test for the non-generic IEnumerable then you'll need to include a using System.Collections directive at the top of your source file.

If you want to test for an IEnumerable<T> of some kind then you'll need something like this instead:

if (variable != null)
{
    if (variable.GetType().GetInterfaces().Any(
            i => i.IsGenericType &&
            i.GetGenericTypeDefinition() == typeof(IEnumerable<>)))
    {
        // foreach...
    }
}