BuildDateAttribute - get build-date in build for cache-busting

Core_BuildDateAttribute.cs

// https://www.meziantou.net/getting-the-date-of-build-of-a-dotnet-assembly-at-runtime.htm

using System;
using System.Globalization;

namespace Core
{
	[AttributeUsage(AttributeTargets.Assembly)]
	public class BuildDateAttribute : Attribute
	{
		public BuildDateAttribute(string value)
		{
			DateTime = DateTime.ParseExact(value, "yyyyMMddHHmmss", CultureInfo.InvariantCulture, DateTimeStyles.None);
		}

		public DateTime DateTime { get; }
	}
}

Web_Pages_Shared__Layout.cshtml

// [...]
@{
  var buildDateAttr = typeof(Web.Startup).Assembly.GetCustomAttributes(typeof(Core.BuildDateAttribute), true).FirstOrDefault() as Core.BuildDateAttribute;
  var date = buildDateAttr != null ? buildDateAttr.DateTime : (DateTime?)null;
  Context.Items["BuildNumber"] = (date == null ? DateTime.Now : date).Value.ToString("yyyyMMddHHmmss");
}
<link rel="stylesheet" href="@(Url.Content("~/libs/bootstrap/css/bootstrap.min.css") + "?c=" + Context.Items["BuildNumber"])">
// [...]

Web_Web.csproj

<!-- [...] -->

<ItemGroup>
  <AssemblyAttribute Include="Core.BuildDateAttribute">
    <_Parameter1>$([System.DateTime]::UtcNow.ToString("yyyyMMddHHmmss"))</_Parameter1>
  </AssemblyAttribute>
</ItemGroup>

<!-- [...] -->