cs/CollectExtension.cs

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

internal static class CollectExtension
{

    public static void ForEach<K, V>(this Dictionary<K, V> collection, Action<K, V> act)
    {
        var count = collection.Count;
        if (count == 0)
            return;
        List<K> keys = new List<K>(collection.Keys);
        for (int i = 0; i < count; i++)
        {
            var key = keys[i];
            if (collection.ContainsKey(key))
                act(key, collection[key]);
        }
    }

    public static void ForEach<K, V>(this Dictionary<K, V> collection, Func<K, V, bool> act)
    {
        var count = collection.Count;
        if (count == 0)
            return;
        List<K> keys = new List<K>(collection.Keys);
        for (int i = 0; i < count; i++)
        {
            var key = keys[i];
            if (collection.ContainsKey(key))
                if (act(key, collection[key]))
                    break;
        }
    }
}