namespace System.Data.Common
{
    [DefaultMember("Item")]
    public sealed class DataColumnMappingCollection : MarshalByRefObject, ICollection, IEnumerable, IList, IColumnMappingCollection
    {
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public int Count { get; }
    }
}