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Home/ Questions/Q 140507
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Asked: May 11, 20262026-05-11T07:37:37+00:00 2026-05-11T07:37:37+00:00

Before I ask my question, please take a look at this example function: DateTime.TryParse(01/01/2000,

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Before I ask my question, please take a look at this example function:

DateTime.TryParse('01/01/2000', out oDate) 

Why do I need to specify the out keyword? Shouldn’t the compiler know this from the function’s definition?

I’m asking this out of pure curiosity in the hope that I will learn something new about the compiler.

I should also clarify that I’m asking about the C# .NET 3.5 compiler in particular.

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  1. 2026-05-11T07:37:37+00:00Added an answer on May 11, 2026 at 7:37 am

    The out keyword could be implied by the compiler but my understanding is that the C# team decided to make the out keyword explicitly required by the caller of the function to increase visibility as to the nature of the parameter.

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