TaskTResult

TaskTResult refers to the result type produced by an asynchronous operation represented by a generic Task in languages that use parameterized types, most notably Task<TResult> in .NET. The result type parameter is conventionally named TResult and denotes the type of value returned when the task completes.

In .NET, Task<TResult> models an asynchronous operation that yields a value of type TResult. Consumers typically await the task to obtain the result, or access the Result property, which blocks until completion. A Task<TResult> can complete successfully with a value, fault with an exception, or be canceled. When awaited, the resulting value is returned and any exception is propagated to the awaiting code; accessing Result may throw the original exception if the task failed.

Usage examples: Task<int> t = Task.Run(() => 42); int answer = await t; // answer is 42. Alternatively, int answer2 = t.Result; // blocks until the task completes.

Implementation notes: Task<TResult> stores the eventual result in a field of type TResult. The result is produced by the asynchronous operation and retrieved once the task completes. If the task faults, accessing await will rethrow the underlying exception; accessing Exception returns an AggregateException.

Common pitfalls: Blocking on asynchronous code by using Result or Wait can lead to deadlocks, especially in UI or synchronization contexts. Prefer await to obtain the TResult. Also, canceled tasks throw OperationCanceledException, which should be properly observed.

See also: System.Threading.Tasks, Task, Task<TResult>, ValueTask, asynchronous programming patterns, awaiters.