How Can I Synchronously Call an Asynchronous Method in C# Without Deadlocks?

Synchronously call asynchronous methods

Suppose there is an asynchronous method, say GenerateCodeAsync(), which returns a task. To call this method synchronously, you need to find a way to coordinate the synchronous and asynchronous code.

One solution is to run the asynchronous method in a thread pool thread and use awaiter to block the thread until the operation completes:

<code class="language-csharp">string code = Task.Run(() => GenerateCodeAsync()).GetAwaiter().GetResult();</code>

Disadvantages of using .Result directly

Direct access to Result properties may result in:

• Deadlock: A call to Result blocks the main thread, preventing asynchronous code from executing.
• AggregateExceptions: Any exceptions thrown by async methods will be wrapped in AggregateException.

To avoid these problems, GetAwaiter().GetResult()method:

• Execute asynchronous methods in thread pool threads to avoid deadlocks.
• Unwrap any thrown exceptions to access them without additional block handlers.

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