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;
namespace System {
    
    using System;
    using System.Runtime.Remoting;
    using System.Runtime.Serialization;

    [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);
        }
    }
}