ApiVersionAttribute.cs

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using System;
using System.Reflection;
 
namespace Tgstation.Server.Api.Properties
{
    [AttributeUsage(AttributeTargets.Assembly)]
    sealed class ApiVersionAttribute : Attribute
    {
        public static ApiVersionAttribute Instance => Assembly
            .GetExecutingAssembly()
            .GetCustomAttribute<ApiVersionAttribute>();
 
        public string RawApiVersion { get; }
 
        public ApiVersionAttribute(
            string rawApiVersion)
        {
            RawApiVersion = rawApiVersion ?? throw new ArgumentNullException(nameof(rawApiVersion));
        }
    }
}