src/mscorlib/shared/System/Collections/Generic/ICollection.cs


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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System;
using System.Runtime.CompilerServices;
using System.Diagnostics.Contracts;

namespace System.Collections.Generic
{
    // Base interface for all collections, defining enumerators, size, and 
    // synchronization methods.
    public interface ICollection<T> : IEnumerable<T>
    {
        // Number of items in the collections.        
        int Count { get; }

        bool IsReadOnly { get; }

        void Add(T item);

        void Clear();

        bool Contains(T item);

        // CopyTo copies a collection into an Array, starting at a particular
        // index into the array.
        // 
        void CopyTo(T[] array, int arrayIndex);

        //void CopyTo(int sourceIndex, T[] destinationArray, int destinationIndex, int count);

        bool Remove(T item);
    }
}