20210222_Global.asax.cs

using System;
using System.IO;
using System.Reflection;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;

namespace VersionConflicts
{
  public class MvcApplication : System.Web.HttpApplication
  {
    protected void Application_Start()
    {
      AppDomain.CurrentDomain.AssemblyResolve += (sender, resolveArgs) =>
      {
        string assemblyInfo = resolveArgs.Name; // e.g "Newtonsoft.Json, Version=11.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed"
        var parts = assemblyInfo.Split(',');
        string name = parts[0];
        var version = Version.Parse(parts[1].Split('=')[1]);
        string fullName;
        if (name == "Newtonsoft.Json" && version.Major == 11)
        {
          // 如果參考的組件為版本11，則載入V11資料夾下的組件
          fullName = Path.Combine(HttpRuntime.AppDomainAppPath, @"bin\V11\Newtonsoft.Json.dll");
        }
        else if (name == "Newtonsoft.Json" && version.Major == 12)
        {
          // 如果參考的組件為版本12，則載入V12資料夾下的組件
          fullName = Path.Combine(HttpRuntime.AppDomainAppPath, @"bin\V12\Newtonsoft.Json.dll");
        }
        else
        {
          return null;
        }

        return Assembly.LoadFile(fullName);
      };

      AreaRegistration.RegisterAllAreas();
      RouteConfig.RegisterRoutes(RouteTable.Routes);
    }
  }
}