IDISP001 when adding to list

[JohanLarsson]

            [Test]
            public void AddingNewDisposableToListOfObject()
            {
                var testCode = @"
namespace RoslynSandbox
{
    using System;
    using System.Collections.Generic;

    public sealed class C
    {
        private List<object> disposables = new List<object>();

        public C()
        {
            this.disposables.Add(↓new Disposable());
        }
    }
}";
                AnalyzerAssert.Diagnostics(Analyzer, ExpectedDiagnostic, DisposableCode, testCode);
            }


            [Test]
            public void AddingFileOpenReadToListOfObject()
            {
                var testCode = @"
namespace RoslynSandbox
{
    using System;
    using System.Collections.Generic;
    using System.IO;

    public sealed class C
    {
        private readonly List<object> streams = new List<object>();

        public C()
        {
            streams.Add(↓File.OpenRead(string.Empty));
        }
    }
}";
                AnalyzerAssert.Diagnostics(Analyzer, ExpectedDiagnostic, testCode);
            }