Persistence.Client/Helpers/ExceptionsHelper.cs

@@ -25,9 +25,11 @@ public static class ExceptionsHelper
 
     public static Exception GetPersistenceException(this IApiResponse response)
     {
-        var exception = ExceptionsDictionary
-            .FirstOrDefault(e => e.Key == response.StatusCode).Value ?? new Exception("Неопознанная ошибка");
+        ExceptionsDictionary
+            .TryGetValue(response.StatusCode, out var exception);
 
-        return exception;
+        var result = exception ?? new Exception("Неопознанная ошибка");
+
+		return result;
     }
 }