在大型数据集上执行LINQ表达式时如何报告进度

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

class Program
{
    static void Main(string[] args)
    {
        List<int> data = Enumerable.Range(1, 1000).ToList();
        int blockSize = 100;
        int totalBlocks = (int)Math.Ceiling(data.Count / (double)blockSize);

        int processedBlocks = 0;
        foreach (var block in data.Batch(blockSize))
        {
            processedBlocks++;
            var result = block.Where(x => x % 2 == 0).ToList();
            Console.WriteLine($"Processed block {processedBlocks}/{totalBlocks}, result count: {result.Count}");
        }

        Console.WriteLine("All blocks processed.");
    }
}

static class EnumerableExtensions
{
    public static IEnumerable<IEnumerable<T>> Batch<T>(this IEnumerable<T> source, int size)
    {
        T[] bucket = null;
        int count = 0;

        foreach (var item in source)
        {
            if (bucket == null)
            {
                bucket = new T[size];
            }

            bucket[count++] = item;

            if (count == size)
            {
                yield return bucket;
                bucket = null;
                count = 0;
            }
        }

        if (bucket != null && count > 0)
        {
            Array.Resize(ref bucket, count);
            yield return bucket;
        }
    }
}