Protected structs in static classes

user_11718061 0
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In C#, this :

static class foo
{
    protected void doThing(); // CS1057
    {

    }
}

Generates the CS1057 compiler error, as static classes don't support inheritance.

So why is this allowed? What is the meaning of the protected keyword in this context?

static class foo
{
    protected struct bar
    {

    }
}
protected static struct c#
1 Answers

This is definitely a bug, and I would suggest you file it.

ECMA-334, the official specification for C#, says the following

15.2.2.4 Static classes
15.2.2.4.1 General

...snip...
A static class declaration is subject to the following restrictions:

  • ...snip...
  • A static class shall not have members with protected or protected internal declared accessibility.

Don't tell me that this excludes nested types, because a few lines later, nested types are specifically excluded from the static modifier restrictions:

The members of a static class are not automatically static, and the member declarations shall explicitly include a static modifier (except for constants and nested types).

user_148689970
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