[Bug]: xUnit code fixer with field `MemberData` converts incorrectly

[ascott18]

Description

The xUnit code fixer for MemberData against a static field on the class (not a method) converts the attribute to MethodDataSource, despite the input not being a method.

    [Theory]
    [MemberData(nameof(Search_DateTimeOffsetsData))]
    public void TestWithMemberData(int input, int expected)
    {
        Assert.Equal(expected, input * 3);
    }

    public static IEnumerable<object[]> Search_DateTimeOffsetsData = new[]
    {
        new object[] { 1, 42 },
        new object[] { 3, 126 },
    };

Expected Behavior

Attribute converts to InstanceMethodDataSource, which surprisingly does work against static fields on the test class.

Actual Behavior

Test converts to the following, which produces an error TUnit0004

    [Test]
    [MethodDataSource(nameof(Search_DateTimeOffsetsData))]
    public async Task TestWithMemberData(int input, int expected)
    {
        await Assert.That(input * 3).IsEqualTo(expected);
    }

    public static IEnumerable<object[]> Search_DateTimeOffsetsData = new[]
    {
        new object[] { 1, 42 },
        new object[] { 3, 126 },
    };

Steps to Reproduce

Run the xUnit fixer against the above xunit code.

TUnit Version

1.14.0

.NET Version

.NET 10

Operating System

Windows

IDE / Test Runner

dotnet CLI (dotnet test / dotnet run)

Error Output / Stack Trace

Additional Context

No response

IDE-Specific Issue?

• I've confirmed this issue occurs when running via dotnet test or dotnet run, not just in my IDE