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BOOK: Professional .NET 2.0 Generics
This is the forum to discuss the Wrox book Professional .NET 2.0 Generics by Tod Golding; ISBN: 9780764559884
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Old March 3rd, 2007, 02:31 PM
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Default Typographical error on page 51

This appears to be a typo, in both the downloadable sample code, and on page 51. The code in the ctor should test for inequality.

public class MySampleClass<T> {
    private static List<T> _values;

    static MySampleClass() {
        if (typeof(T).IsAbstract == false)
            throw new Exception("T must not be abstract");
            _values = new List<T>();

Ketil Wright
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Old July 14th, 2008, 12:06 AM
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I came here to look at the errata when I saw that too. I was hoping it wasn't just me.

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Old May 22nd, 2013, 05:12 AM
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I typed "if (typeof(T).IsAbstract == true)" in my C# instead of "if (typeof(T).IsAbstract == false)" and it worked fine.
A similar issue is already mentioned in the Errata for the VB code.

I tried using the Errata Form to report the problem in C# but the form was asking me for some password so I gave up
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