disposing IEnumerator not allowed

build.log

1>------ Build started: Project: Disposable, Configuration: Debug Any CPU ------
1>c:\users\ohnob\AppData\Local\Temp\Disposable\Disposable\Program.cs(13,16,13,59): error CS1674: 'IEnumerator': type used in a using statement must be implicitly convertible to 'System.IDisposable'
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Program.cs

using System.Collections;

class Program
{
    static void Main(string[] args)
    {
        IEnumerable enumerable = new[]
        {
            "a",
            "b",
            "c",
        };
        using (var enumerator = enumerable.GetEnumerator())
        {
        }
    }
}