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

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 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...
    }
}