Cannot have a PropertyAttribute named "Category"

[iamdmitrij]

This is related to issue I've submitted to NUnit repo a while back.

Using [Property("Category", "Test")] on a test, does not work as expected with property name "Category".

Property name with value "Category" is omitted from Visual Studio Test Explorer:

[Test]
[Property("Category", "Invisible")]
public void Test()
{
    Assert.Pass();
}

However, if property key is other than Category, tests [Property("FakeCategory", "Visible")] - it works perfectly fine.

[Test]
[Property("FakeCategory", "Visible")]
public void Test()
{
    Assert.Pass();
}

This is quite relevant if there are multiple test projects in solution using different frameworks - MSTest, xUnit, NUnit. In all mentioned frameworks except NUnit tagging with name and value where property name=Category works fine.

NUnit version: 3.13.2
IDE: Visual Studio 2022 17.0.1

After looking at source code I've found following line:

nunit3-vs-adapter/src/NUnitTestAdapter/CategoryList.cs

Line 93 in e80964e

if (propertyNode.Name != NUnitTestCategoryLabel)

Could someone please clarify why such constraint is needed?