It is an alternative way to loop in csharp

AlternativeWayToLoop.cs

using static System.Console;

WriteLine("bu csharp-di?");

foreach (var i in 1..10)
{
    WriteLine($"{i} beli!!!");
}

internal static class RangeExtensions
{
    public static RangeEnumerator GetEnumerator(this Range r) => new(r);

    internal struct RangeEnumerator
    {
        private readonly int _end;

        public int Current { get; private set; }

        public bool MoveNext()
        {
            Current++;
            return Current <= _end;
        }

        public RangeEnumerator(Range r)
        {
            Current = r.Start.Value - 1;
            _end = r.End.Value;
        }
    }
}