Question

考虑以下守则:

#if DEBUG
    if (Systems.Contains(system))
        throw new InvalidOperationException("System already registered");
#endif

    Debug.Assert(!Systems.Contains(system), "System already registered");

此前,我曾习惯于做过,我曾发现过<代码>。 Debug.Assert 。

我为什么不总是喜欢<代码>? Debug.Assert ?

It only exists in debug code (it has the attribute [Conditional("DEBUG")]).
It seems to me to be more suited to my intention (code sanity checks, rather than raising exceptions to be handled later).
It s less code to write.

Answer 1

You can always use Debug.Assert(), because this class is complied with the DEBUG conditional as well:

[Conditional("Debug")]

Indicates to compilers that a method call or attribute should be ignored unless a specified conditional compilation symbol is defined.

ConditionalAttribute is applied to the methods that are defined in the Debug and Trace classes.
http://msdn.microsoft.com/en-us/library/system.diagnostics.conditionalattribute.aspx

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