Unexpected Attribute Count behavior

[AnakinRaW]

Hey all,

I have the following Code:

[AttributeUsage(AttributeTargets.All, Inherited = true, AllowMultiple = true)]
public class TestAttributeInheritMultiple : Attribute
{
}

public class TestAttributeInheritMultipleDerived : TestAttributeInheritMultiple
{
}

[TestAttributeInheritMultipleDerived]
[TestAttributeInheritMultipleDerived]
public class AttributeTestClass
{
}

[TestAttributeInheritMultipleDerived]
public class AttributeTestClassDerived : AttributeTestClass
{
}

when i call typeof(AttributeTestClassDerived).GetCustomAttributes(true).Length; i get only 1 attribute, though i was expecting the get 3.

There are some side observations that lead to my confusion:

• inspecting the attribute usage of TestAttributeInheritMultipleDerived yields Inherited = true and AllowMultiple = true. (as expected)
• adding [AttributeUsage(AttributeTargets.All, Inherited = true, AllowMultiple = true)] line to TestAttributeInheritMultipleDerived (which should be unnecessary because it already has these usage attributes from its base class) i get 3 attributes back for AttributeTestClassDerived.

Is this expected behavior and I'm overseeing something here, or this is a bug?

Cheers

[nibdev]

[gurustron]

@nibdev this discussion is from 2021. It was created waaaaaaay earlier then your question.

[nibdev]

@gurustron i'm really sorry, i havent checked the date and was not able to find this discussion or everything else about the topic before...

[gurustron]

@nibdev no problem!

[gurustron]

Created an issue - #88473 in hope that it will gain more attention.