#if NET20 || NET30 || NET35 || !NET_4_6

// 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.

namespace System.Diagnostics.Contracts
{
    /// <summary>
    /// Methods and classes marked with this attribute can be used within calls to Contract methods. Such methods not make any visible state changes.
    /// </summary>
    [Conditional("CONTRACTS_FULL")]
    [AttributeUsage(AttributeTargets.Constructor | AttributeTargets.Method | AttributeTargets.Property | AttributeTargets.Event | AttributeTargets.Delegate | AttributeTargets.Class | AttributeTargets.Parameter, AllowMultiple = false, Inherited = true)]
    public sealed class PureAttribute : Attribute
    {
        // Empty
    }
}

#endif