Range Extensions

RangeExtensions.cs

using System;
using System.Collections;
using System.Collections.Generic;

// public class Program {
//    public static void Main() {
//        foreach(var i in 1..5) {
//            Console.WriteLine(i);
//        }
//    }
//    
// }

public static class RangeExtensions {
    public struct RangeEnumerator : IEnumerator<int> {
        private readonly int endValue;

        public RangeEnumerator(int beginValue, int endValue) {
            this.Current  = --beginValue;
            this.endValue = endValue;
        }

        public int Current { get; private set; }

        object IEnumerator.Current => this.Current;

        public bool MoveNext() => ++this.Current <= this.endValue;

        public void Reset() {}

        public void Dispose() {}
    }
    
    public static RangeEnumerator GetEnumerator(this Range range) 
        => new RangeEnumerator(range.Start.Value, range.End.Value);
}