SA1402 does not recognise structs

Given the file Foo.cs:

internal class Foo
{
}

internal struct Baz
{
}

internal class Bar
{
}

Only the class Bar generates a warning; see screenshot below showing struct Baz does not have green squiggly.

Also, given Baz.cs:

internal struct Baz
{
}

internal class Bar
{
}

internal class Foo
{
}

class Bar does not generate a warning for SA1402 Changing struct Baz to class Baz suddenly makes SA1402 appear for class Bar

[sharwell]

Duplicate of #1756. We’ve actually already approved changing the behavior of SA1402 (which would require corresponding documentation updates), but no one has taken it on yet. 😄

[appel1]

If you change the behavior of the rule or make it configurable I think it should also be renamed to avoid confusion. The current name, SA1402FileMayOnlyContainASingleClass, makes it very obvious that it only applies it classes.

If it is made configurable don’t forget interface, enum and delegate.