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c#resharperstylecop

What is the Syntax error StyleCop is complaining about?

Working with code from Jon Skeet's MiscUtil library, I came across this constructor:

public SmartEnumerable(IEnumerable<T> enumerable)
{
    if (enumerable == null)
    {
        throw new ArgumentNullException ("enumerable");
    }

    this.enumerable = enumerable;
}

I have both ReSharper and the StyleCop extension installed. I was curious to see what the R# suggestion here would be. It was simplifying the code to the following:

public SmartEnumerable(IEnumerable<T> enumerable)
{
    this.enumerable = enumerable ?? throw new ArgumentNullException(nameof(enumerable));
}

StyleCop however has immediately complained with an error message:

A syntax error has been discovered in file SmartEnumerable.cs [StyleCop Rule: SA0102]

I am working on a .NET Standard 1.6 project with VS2017.

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Solution

  • StyleCop does not support all of the latest C# language features. This particular behaviour you have found is a known issue.

    I'd recommend you switch to StyleCop Analyzers.