ObsoleteAttribute.cs

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namespace System;
 
[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Enum | AttributeTargets.Constructor | AttributeTargets.Method | AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Event | AttributeTargets.Interface | AttributeTargets.Delegate, Inherited = false)]
public sealed class ObsoleteAttribute : Attribute
{
    public string? Message { get; }
 
    public bool IsError { get; }
 
    public string? DiagnosticId { get; set; }
 
    public string? UrlFormat { get; set; }
 
    public ObsoleteAttribute()
    {
    }
 
    public ObsoleteAttribute(string? message)
    {
        Message = message;
    }
 
    public ObsoleteAttribute(string? message, bool error)
    {
        Message = message;
        IsError = error;
    }
}