src/mscorlib/src/System/Empty.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.
////////////////////////////////////////////////////////////////////////////////
// Empty
//    This class represents an empty variant
////////////////////////////////////////////////////////////////////////////////

using System.Diagnostics.Contracts;

using System;
using System.Runtime.Remoting;
using System.Runtime.Serialization;

namespace System
{
    [Serializable]
    internal sealed class Empty : ISerializable
    {
        private Empty()
        {
        }

        public static readonly Empty Value = new Empty();

        public override String ToString()
        {
            return String.Empty;
        }

        public void GetObjectData(SerializationInfo info, StreamingContext context)
        {
            if (info == null)
            {
                throw new ArgumentNullException(nameof(info));
            }
            Contract.EndContractBlock();
            UnitySerializationHolder.GetUnitySerializationInfo(info, UnitySerializationHolder.EmptyUnity, null, null);
        }
    }
}