無法載入System.Diagnostics.DiagnosticSource錯誤

專案升級套件後，Web、API相繼掛點，出現黃白畫面：

Could not load file or assembly 'System.Diagnostics.DiagnosticSource, Version=4.0.2.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

查詢版控記錄：System.Diagnostics.DiagnosticSource由4.4.0升級至4.4.1。還好，幾個專案有一個更新後能正執行。經過一一比對問題出在 Web.config 裡的<bindingRedirect />設定上。

<dependentAssembly>
     <assemblyIdentity name="System.Diagnostics.DiagnosticSource" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
     <bindingRedirect oldVersion="0.0.0.0-4.0.2.0" newVersion="4.0.2.0" />
 </dependentAssembly>
 

正常執行的專案：

<dependentAssembly>
     <assemblyIdentity name="System.Diagnostics.DiagnosticSource" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
     <bindingRedirect oldVersion="0.0.0.0-4.0.2.1" newVersion="4.0.2.1" />
 </dependentAssembly>
 

一一修正bindingRedirect至4.0.2.1，專案Web、API回復正常，搞定收工。

在在EF Core的一個Issue #7889討論串看到關鍵的4.0.2.1字。