Provide a machine-processable exception which is not based on strings

When using LibGit2Sharp with a remote repository, sometimes errors occur. Those are throw as LibGit2SharpException. At this point these exceptions can only be distinguished from each other by the exception message.
Is there a way to get certain server responses like a 404 as HTTPStatusCode and not have to extract it from the message? For example, if the URL is incorrect (server exists, but path is not valid), a LibGit2SharpException is thrown which returns "invalid url, missing path" as a message. Here a HTTPStatusCode inside the Exception would be better suited to distinguish between different server responses and to react accordingly.

Version of LibGit2Sharp (release number or SHA1)

V0.26

Operating system(s) tested; .NET runtime tested

Windows 10; .NET 4.6

首先追蹤遠端儲存庫操作收到伺服器錯誤時 LibGit2SharpException 的建立方式，尤其是 issue 中描述的無效 URL 範例。判斷如何在不依賴訊息的情況下公開可由機器處理的 HTTP 狀態，並為 404 回應和無效路徑回應新增覆蓋。完成的定義是呼叫端可以透過程式區分這些回應。