diff --git a/binding/csharp/IP2Region.Net.Test/IP2Region.Net.Test.csproj b/binding/csharp/IP2Region.Net.Test/IP2Region.Net.Test.csproj
index 9e40761..bd7c233 100644
--- a/binding/csharp/IP2Region.Net.Test/IP2Region.Net.Test.csproj
+++ b/binding/csharp/IP2Region.Net.Test/IP2Region.Net.Test.csproj
@@ -21,8 +21,8 @@
   </ItemGroup>
 
   <ItemGroup>
-    <Content Include="..\..\..\data\ip.merge.txt">
-      <Link>TestData/ip.merge.txt</Link>
+    <Content Include="..\..\..\data\ipv4_source.txt">
+      <Link>TestData/ipv4_source.txt</Link>
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
     <Content Include="..\..\..\data\ip2region_v4.xdb">