NullableAttribute.cs

#if NET6_0
namespace System.Runtime.CompilerServices
{
    /// <summary>
    /// Reserved for use by a compiler for tracking metadata.
    /// This attribute should not be used by developers in source code.
    /// </summary>
    //[EditorBrowsable(EditorBrowsableState.Never)]
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Event | AttributeTargets.Parameter | AttributeTargets.ReturnValue | AttributeTargets.GenericParameter, Inherited = false)]
    public sealed class NullableAttribute : Attribute
    {
        #region Public Fields

        /// <summary>Flags specifying metadata related to nullable reference types.</summary>
        public readonly byte[] NullableFlags;

        #endregion Public Fields

        #region Public Constructors

        /// <summary>Initializes the attribute.</summary>
        /// <param name="value">The flags value.</param>
        public NullableAttribute(byte value)
        {
            NullableFlags = new[] { value };
        }

        /// <summary>Initializes the attribute.</summary>
        /// <param name="value">The flags value.</param>
        public NullableAttribute(byte[] value)
        {
            NullableFlags = value;
        }

        #endregion Public Constructors
    }
}
#endif