// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

namespace System.Diagnostics.CodeAnalysis;

/// <summary>
///  Indicates that the specified method requires dynamic access to code that is not referenced
///  statically, for example through <see cref="Reflection"/>.
/// </summary>
/// <remarks>
///  <para>
///  This allows tools to understand which methods are unsafe to call when removing unreferenced
///  code from an application.
///  </para>
/// </remarks>
[AttributeUsage(AttributeTargets.Method | AttributeTargets.Constructor | AttributeTargets.Class, Inherited = false)]
#if SYSTEM_PRIVATE_CORELIB
public
#else
internal
#endif
    sealed class RequiresUnreferencedCodeAttribute : Attribute
{
    /// <summary>
    /// Initializes a new instance of the <see cref="RequiresUnreferencedCodeAttribute"/> class
    /// with the specified message.
    /// </summary>
    /// <param name="message">
    /// A message that contains information about the usage of unreferenced code.
    /// </param>
    public RequiresUnreferencedCodeAttribute(string message)
    {
        Message = message;
    }

    /// <summary>
    /// Gets a message that contains information about the usage of unreferenced code.
    /// </summary>
    public string Message { get; }

    /// <summary>
    /// Gets or sets an optional URL that contains more information about the method,
    /// why it requires unreferenced code, and what options a consumer has to deal with it.
    /// </summary>
    public string? Url { get; set; }
}
