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Code Analyzer for C#

There is a newer version: 10.2.0.105762

Why is this an issue?
Events that are not invoked anywhere are dead code, and there’s no good reason to keep them in the source.
Noncompliant code example
class UninvokedEventSample
{
    private event Action<object, EventArgs> Happened; // Noncompliant

    public void RegisterEventHandler(Action<object, EventArgs> handler)
    {
        Happened += handler; // we register some event handlers
    }

    public void RaiseEvent()
    {
        if (Happened != null)
        {
            // Happened(this, null); // the event is never triggered, because this line is commented out.
        }
    }
}