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[Source] .NET/C# method parameter NULL null

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Posted on 6/26/2023 8:51:24 PM | | | |
Requirements: You need to determine whether the parameter value passed by the method is null and NULL, and if it is NULL, an exception is thrown.

Generally, we can determine whether the parameter value is NULL, usually the code is as follows:

Although we can achieve the effect we want, the code is not elegant enough, and programmers try to write less code to implement it, and spend time on more meaningful things.

The .NET 7 runtime provides ArgumentNullException.ThrowIfNull, ArgumentException.ThrowIfNullOrEmpty to determine if the parameter is NULL or an empty string throws an exception.

ArgumentNullException.ThrowIfNull(This method is already available in .NET 6):The hyperlink login is visible.
ArgumentException.ThrowIfNullOrEmpty：The hyperlink login is visible.

The test code is as follows:



The source code is as follows:



As for [CallerArgumentExpression] feature is actually syntactic sugar, which is already determined at the time of compilation.



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