refactor 移除无效代码,增加注释

Src/Dlhis.Jip.Api/ResultHandlers/DHRResultHandler.cs

@@ -8,13 +8,12 @@ namespace Dlhis.Jip.Api.ResultHandlers;
 
 public class DHRResultHandler : IRemoteCallResultHandler
 {
-    /// <inheritdoc />
     public TResult Handle<TResult>(HttpStatusCode statusCode, string responseBody)
     {
         var apiResult = JsonConvert.DeserializeObject<DHRResponse<object>>(responseBody);
-        
+
         var isSuccessStatusCode = ((int)statusCode >= 200) && ((int)statusCode <= 299);
-        if (!isSuccessStatusCode || apiResult.Code != 200)
+        if (!isSuccessStatusCode || apiResult?.Code != 200)
         {
             if (!string.IsNullOrEmpty(apiResult?.Message))
             {