From 1af0c82144a0f28f86922ecda04b159a553c699e Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Thu, 4 Feb 2021 20:54:18 +0800
Subject: ...

---
 BackEnd/Timeline/Models/Validation/Validator.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'BackEnd/Timeline/Models/Validation/Validator.cs')

diff --git a/BackEnd/Timeline/Models/Validation/Validator.cs b/BackEnd/Timeline/Models/Validation/Validator.cs
index b7e754d3..ec6cc0af 100644
--- a/BackEnd/Timeline/Models/Validation/Validator.cs
+++ b/BackEnd/Timeline/Models/Validation/Validator.cs
@@ -51,7 +51,7 @@ namespace Timeline.Models.Validation
 
         public (bool, string) Validate(object? value)
         {
-            if (value == null)
+            if (value is null)
             {
                 if (PermitNull)
                     return (true, GetSuccessMessage());
-- 
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