v2 v3   Error

xUnit9004

"Type must be public or internal"

Cause

A violation of this rule occurs when a type used by code generation is not visible to the generated code.

Reason for rule

There are situations the user defined code can be compiled, but generated code needs access to a type which is not reachable due to its declared visibility. This most commonly occurs with references to private nested types.

How to fix violations

To fix a violation of this rule, declare the type as either public or internal.

Examples

Violates

using Xunit;
using Xunit.v3;

public class xUnit9004_BeforeAfter
{
    [Fact, MyBeforeAfter]
    public void TestMethod() { }

    class MyBeforeAfter : BeforeAfterTestAttribute { }
}

Does not violate

using Xunit;
using Xunit.v3;

public class xUnit9004_BeforeAfter
{
    [Fact, MyBeforeAfter]
    public void TestMethod() { }

    internal class MyBeforeAfter : BeforeAfterTestAttribute { }
}