EnumerationExtensions.cs

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using System.Collections.Generic;
 
namespace java.util
{
 
    public static class EnumerationExtensions
    {
 
        public static IEnumerator<T> AsEnumerator<T>(this Enumeration enumeration) => enumeration switch
        {
            IEnumerator<T> i => i,
            Enumeration i => new EnumerationWrapper<T>(i),
        };
 
        public static IEnumerable<T> AsEnumerable<T>(this Enumeration enumeration)
        {
            var e = enumeration.AsEnumerator<T>();
            while (e.MoveNext())
                yield return e.Current;
        }
 
    }
 
}