Regression IDISP016 in foreach

[Johan Larsson]

namespace N
{
    using System;
    using System.Collections.ObjectModel;

    public sealed class C : IDisposable
    {
        private bool disposed;

        public ObservableCollection<Disposable> Disposables{ get; } = new();

        public void M()
        {
            foreach (var conversion in this.Disposables)
            {
                conversion.Dispose();
            }
        }

        public void Dispose()
        {
            if (this.disposed)
            {
                return;
            }

            this.disposed = true;
            foreach (var conversion in this.Disposables)
            {
                conversion.Dispose();
            }

            this.Disposables.Clear();
        }
    }
}