Dictionary vs ConcurrentDictionary: Thread-Safe Seçim Rehberi

1using System;
2using System.Collections.Generic;
3using System.Threading;
4using System.Threading.Tasks;
5
6var dict = new Dictionary<int, string>();
7
8var tasks = new Task[2];
9tasks[0] = Task.Run(() => {
10for(int i = 0; i < 5; i++) {
11dict[i] = $"Değer {i}";
12Thread.Sleep(10);
13}
14});
15
16tasks[1] = Task.Run(() => {
17for(int i = 5; i < 10; i++) {
18dict[i] = $"Değer {i}";
19Thread.Sleep(10);
20}
21});
22
23Task.WaitAll(tasks);
24Console.WriteLine($"Toplam: {dict.Count}");

1using System;
2using System.Collections.Concurrent;
3using System.Threading;
4using System.Threading.Tasks;
5
6var dict = new ConcurrentDictionary<int, string>();
7
8var tasks = new Task[2];
9tasks[0] = Task.Run(() => {
10for(int i = 0; i < 5; i++) {
11dict[i] = $"Değer {i}";
12Thread.Sleep(10);
13}
14});
15
16tasks[1] = Task.Run(() => {
17for(int i = 5; i < 10; i++) {
18dict[i] = $"Değer {i}";
19Thread.Sleep(10);
20}
21});
22
23Task.WaitAll(tasks);
24Console.WriteLine($"Toplam: {dict.Count}");

1var cache = new ConcurrentDictionary<string, int>();
2
3// Ekleme
4cache.TryAdd("kullanıcı1", 100);
5cache.TryAdd("kullanıcı2", 200);
6
7// Okuma
8if(cache.TryGetValue("kullanıcı1", out var deger)) {
9Console.WriteLine($"Değer: {deger}"); // Çıktı: Değer: 100
10}
11
12// Silme
13cache.TryRemove("kullanıcı2", out _);
14
15Console.WriteLine($"Kalan: {cache.Count}"); // Çıktı: Kalan: 1