Thread-Safe Dictionaries in .NET: ConcurrentDictionary vs. Custom Implementations?

.NET Thread-Safe Dictionary: ConcurrentDictionary vs. Custom Implementation

One way to ensure thread safety in a dictionary is to create a custom implementation, such as

derived from IDictionary. However, modern .NET versions offer a simpler and more elegant solution: SafeDictionary. ConcurrentDictionary The

class is designed for multi-threaded environments and has several advantages over manual methods: ConcurrentDictionary

• Built-in thread safety: Has built-in thread synchronization mechanism, no need for explicit locking. ConcurrentDictionary
• Simple code: Simplified API reduces code complexity, making the code clearer and easier to maintain.
• High performance: Uses a lock-free algorithm to ensure maximum performance even under high concurrency. ConcurrentDictionary

Example:

<code class="language-csharp">var sharedDictionary = new ConcurrentDictionary<TKey, TValue>();

// 添加项（无需手动锁定）
sharedDictionary.TryAdd(key, value);</code>

By using

you can achieve thread safety without sacrificing the elegance or performance of your code. ConcurrentDictionary

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