.NET Fiddle

CSharp · Console

/Program.cs

using System;
using System.Collections.Generic;

public class Program
{
	public static void Main()
	{
        List<string> fruits = new() { "1", "2", "3", "4", "5", "6", "7", "8", "9", "10" };
		
		var e = fruits.GetEnumerator();
		var firstThree = e.Take(3);
		var nextThree = e.Take(3);
		
		// prints 1, 2, 3
		foreach (var x in firstThree)
			Console.WriteLine(x);

		// also prints 1, 2, 3
		foreach (var x in nextThree)
			Console.WriteLine(x);
    }
}

public static class Extensions
{
	public static List<T> Take<T>(this IEnumerator<T> e, int num)
	{
		List<T> list = new List<T>(num);
		int taken = 0;
		while (taken < num && e.MoveNext())
		{
			list.Add(e.Current);
			taken++;
		}

		return list;
	}
}