ReferenceEqualityComparer.cs

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using System.Runtime.CompilerServices;
 
namespace System.Collections.Generic;
 
public sealed class ReferenceEqualityComparer : IEqualityComparer<object?>, IEqualityComparer
{
    public static ReferenceEqualityComparer Instance { get; } = new ReferenceEqualityComparer();
 
 
    private ReferenceEqualityComparer()
    {
    }
 
    public new bool Equals(object? x, object? y)
    {
        return x == y;
    }
 
    public int GetHashCode(object? obj)
    {
        return RuntimeHelpers.GetHashCode(obj);
    }
}