MergablePropertyAttribute.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.ComponentModel;
 
[AttributeUsage(AttributeTargets.All)]
public sealed class MergablePropertyAttribute : Attribute
{
    public static readonly MergablePropertyAttribute Yes = new MergablePropertyAttribute(allowMerge: true);
 
    public static readonly MergablePropertyAttribute No = new MergablePropertyAttribute(allowMerge: false);
 
    public static readonly MergablePropertyAttribute Default = Yes;
 
    public bool AllowMerge { get; }
 
    public MergablePropertyAttribute(bool allowMerge)
    {
        AllowMerge = allowMerge;
    }
 
    public override bool Equals([NotNullWhen(true)] object? obj)
    {
        if (obj is MergablePropertyAttribute mergablePropertyAttribute)
        {
            return mergablePropertyAttribute.AllowMerge == AllowMerge;
        }
        return false;
    }
 
    public override int GetHashCode()
    {
        return base.GetHashCode();
    }
 
    public override bool IsDefaultAttribute()
    {
        return Equals(Default);
    }
}