Umbraco-CMS/src/Umbraco.Core/Composing/IBuilderCollection.cs

using System.Collections.Generic;

namespace Umbraco.Core.Composing
{
    /// <summary>
    /// Represents a builder collection, ie an immutable enumeration of items.
    /// </summary>
    /// <typeparam name="TItem">The type of the items.</typeparam>
    public interface IBuilderCollection<out TItem> : IEnumerable<TItem>
    {
        /// <summary>
        /// Gets the number of items in the collection.
        /// </summary>
        int Count { get; }
    }
}