Steven Giesel • 12/28/2025

Task.Delay fails if you wait longer than 49.7 days

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This technical article details a limitation in C#'s Task.Delay method, which throws an ArgumentOutOfRangeException for delays exceeding approximately 49.7 days due to an internal 32-bit millisecond maximum. It explains the cause, discusses when this edge case matters (e.g., in job schedulers), and provides a practical code solution using a helper method for safely handling long delays.

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#c #async #Timeout
Task.Delay fails if you wait longer than 49.7 days

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