Roslyn Analyzer不能在项目中使用多个文件

Question

好的，我在项目中运行了这个分析器：

    [DiagnosticAnalyzer(LanguageNames.CSharp)]
public class GipAnalyzerAnalyzer : DiagnosticAnalyzer
{
    public const string DiagnosticId = "TestAnalyzer";

    private static readonly string Title = "Using directive";
    private static readonly string MessageFormat = "Please do not use this namespace in that solution.";
    private static readonly string Description = "Some namespace should not be used in certain projects";
    private const string Category = "Using Directives";

    private static DiagnosticDescriptor Rule = new DiagnosticDescriptor(DiagnosticId, Title, MessageFormat, Category, DiagnosticSeverity.Warning, isEnabledByDefault: true, description: Description);

    public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics { get { return ImmutableArray.Create(Rule); } }

    public override void Initialize(AnalysisContext context)
    {
         context.RegisterSyntaxNodeAction(AnalyzeSyntax, SyntaxKind.UsingDirective);
    }

    private void AnalyzeSyntax(SyntaxNodeAnalysisContext obj)
    {

        var directive = (UsingDirectiveSyntax) obj.Node;
        var qualifiedName = directive.Name;
        var qualifiedNameString = qualifiedName.ToFullString();

        if (qualifiedNameString.StartsWith("Name.Space.1") ||
            qualifiedNameString.StartsWith("Name.Space.2"))
        {
            // produce a diagnostic.
            var diagnostic = Diagnostic.Create(Rule, qualifiedName.GetLocation(), qualifiedName);
            obj.ReportDiagnostic(diagnostic);
        }
    }

}

在项目中有多个文件之前，一切运行良好。 例如，在项目中有两个文件，可以正确识别诊断，但不显示诊断。

有什么想法吗？