In this article on docs microsoft, in the example for Parallel.For in the method, there is a Break call and processing of properties such as ShouldExitCurrentIteration and LowestBreakIteration in the following way:

    if (state.ShouldExitCurrentIteration)
    {
       if (state.LowestBreakIteration < i)
       return;
    }

LowestBreakIteration stores the number of the minimum iteration in which Break method was called. Also, this property can store the value of the internally-generated index for example in the case of the method Parallel.ForEach (source on docs microsoft)

Question. What should I do with property LowestBreakIteration in case of Parallel.ForEach, how should I use it and what should I compare with?

I easily repeated the example with Break for Parallel.For, but I can't figure out how to use the property LowestBreakIteration in the example with Break for Parallel.ForEach.

using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            //Parallel.For
            void MyMethodForParallelForBreak(int i, ParallelLoopState MyParallelLoopState)
            {
                Console.WriteLine($"Start {i}");

                if (MyParallelLoopState.ShouldExitCurrentIteration)
                {
                    if (MyParallelLoopState.LowestBreakIteration < i) //Processing LowestBreakIteration here
                    {
                        Console.WriteLine($"Current {i}. Return: LowestBreakIteration {MyParallelLoopState.LowestBreakIteration} < {i}");
                        return;
                    }
                }

                if (MyParallelLoopState.LowestBreakIteration != null)
                {
                    Console.WriteLine($"Current {i}. LowestBreakIteration {MyParallelLoopState.LowestBreakIteration}");
                }

                if (i > 5)
                {
                    MyParallelLoopState.Break();

                    Console.WriteLine($"Current {i}. Break");
                }

                Console.WriteLine($"End {i}");
            }

            Parallel.For(1, 11, MyMethodForParallelForBreak);

            Console.WriteLine("\n");



            //Parallel.ForEach
            void MyMethodForParallelForEachBreak(KeyValuePair<string, string> MyKeyValuePair, ParallelLoopState MyParallelLoopState)
            {
                Console.WriteLine($"Start {MyKeyValuePair.Key}");

                if (MyParallelLoopState.ShouldExitCurrentIteration)
                {
                    if (MyParallelLoopState.LowestBreakIteration < ) //Error. Unknown. Processing LowestBreakIteration here
                    {
                        Console.WriteLine($"Current {MyKeyValuePair.Key}. Return: LowestBreakIteration {MyParallelLoopState.LowestBreakIteration} < Unknown");
                        return;
                    }
                }

                if (MyParallelLoopState.LowestBreakIteration != null)
                {
                    Console.WriteLine($"Current {MyKeyValuePair.Key}. LowestBreakIteration {MyParallelLoopState.LowestBreakIteration}");
                }

                if (MyKeyValuePair.Value == "a")
                {
                    MyParallelLoopState.Break();

                    Console.WriteLine($"Current {MyKeyValuePair.Key}. Break");
                }

                Console.WriteLine($"End {MyKeyValuePair.Key}");
            }


            Dictionary<string, string> MyDictionaryForStringAndString = new Dictionary<string, string>();

            MyDictionaryForStringAndString.Add("a1", "abc");
            MyDictionaryForStringAndString.Add("a2", "ab");
            MyDictionaryForStringAndString.Add("a3", "a");
            MyDictionaryForStringAndString.Add("a4", "abc");
            MyDictionaryForStringAndString.Add("a5", "ab");
            MyDictionaryForStringAndString.Add("a6", "a");
            MyDictionaryForStringAndString.Add("a7", "abc");
            MyDictionaryForStringAndString.Add("a8", "ab");
            MyDictionaryForStringAndString.Add("a9", "a");
            MyDictionaryForStringAndString.Add("a10", "abc");

            Parallel.ForEach(MyDictionaryForStringAndString, MyMethodForParallelForEachBreak);
        }
    }
}