FLTFY13: Descriptor must be unique within a type

TypeName	FLTFY13_DescriptorAttributeAnalyzer
CheckId	FLTFY13
Category	Usage
Severity	Error
IsEnabled	True

Cause

This diagnostic is raised when two properties on the same type are annotated with Descriptor and resolve to the same descriptor value.

Rule Description

Descriptor values map directly to generated extension method names. Duplicate descriptor values on a single type would produce method name collisions and ambiguous intent, so each descriptor must be unique.

Noncompliant Code Example

using Fluentify;

[Fluentify]
public class Person
{
    [Descriptor("WithValue")]
    public string FirstName { get; set; }

    [Descriptor("WithValue")]
    public string LastName { get; set; }
}

Compliant Code Example

using Fluentify;

[Fluentify]
public class Person
{
    [Descriptor("WithFirstName")]
    public string FirstName { get; set; }

    [Descriptor("WithLastName")]
    public string LastName { get; set; }
}

Suppressing Warnings

You can suppress this diagnostic using standard .NET suppression mechanisms:

#pragma warning disable FLTFY13 // Descriptor must be unique within a type
// ... code that intentionally duplicates descriptors ...
#pragma warning restore FLTFY13 // Descriptor must be unique within a type

or:

using System.Diagnostics.CodeAnalysis;

[SuppressMessage("Usage", "FLTFY13:Descriptor must be unique within a type", Justification = "Explanation for suppression")]

How to Disable FLTFY13

In your .editorconfig:

# Disable FLTFY13: Descriptor must be unique within a type
dotnet_diagnostic.FLTFY13.severity = none