Do not use ConfigureAwaitOptions.SuppressThrowing with Task

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Metadata

ID: csharp-best-practices/suppressthrowing

Language: C#

Severity: Notice

Category: Best Practices

Description

The SuppressThrowing option in ConfigureAwaitOptions can’t be used with Task<TResult>, as it may cause an invalid TResult to be returned. This rule detects such cases to ensure the issue is caught during compilation rather than during execution.

Non-Compliant Code Examples

Task<int> t = new Task<int>(() => 1);
t.ConfigureAwait(ConfigureAwaitOptions.SuppressThrowing);

Compliant Code Examples

Task<int> t = new Task<int>(() => 1);
((Task)t).ConfigureAwait(ConfigureAwaitOptions.SuppressThrowing);