From ad84da7d3cf75dce7e285d7f95d1f017dede263d Mon Sep 17 00:00:00 2001
From: Argo Zhang <argo@live.ca>
Date: Fri, 21 Nov 2025 12:38:10 +0800
Subject: [PATCH] =?UTF-8?q?test:=20=E6=9B=B4=E6=96=B0=E5=8D=95=E5=85=83?=
 =?UTF-8?q?=E6=B5=8B=E8=AF=95?=
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---
 binding/csharp/IP2Region.Net.Test/XdbTest.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/binding/csharp/IP2Region.Net.Test/XdbTest.cs b/binding/csharp/IP2Region.Net.Test/XdbTest.cs
index e7bec8d..2e4a75f 100644
--- a/binding/csharp/IP2Region.Net.Test/XdbTest.cs
+++ b/binding/csharp/IP2Region.Net.Test/XdbTest.cs
@@ -1,4 +1,4 @@
-using Xunit;
+using Xunit;
 
 namespace IP2Region.Net.Test;
 
@@ -36,7 +36,7 @@ public class XdbTest
     [Fact]
     public async Task GetVersionAsync_Error()
     {
-        await Assert.ThrowsAsync<ArgumentNullException>(async () => await XDB.Util.GetVersionAsync(null));
+        await Assert.ThrowsAsync<ArgumentNullException>(async () => await XDB.Util.GetVersionAsync(null!));
         await Assert.ThrowsAsync<FileNotFoundException>(async () => await XDB.Util.GetVersionAsync(Path.Combine(AppContext.BaseDirectory, "test.xdb")));
     }
 }