diff --git a/csharp/Lib/SysTools/SysTools.csproj b/csharp/Lib/SysTools/SysTools.csproj
index 629608dc6..72e17cc9b 100644
--- a/csharp/Lib/SysTools/SysTools.csproj
+++ b/csharp/Lib/SysTools/SysTools.csproj
@@ -6,7 +6,7 @@
     </ItemGroup>
 
     <ItemGroup>
-      <ProjectReference Include="..\Utils\Utils.csproj" />
+      <ProjectReference Include="../Utils/Utils.csproj" />
     </ItemGroup>
 
 </Project>
diff --git a/csharp/Lib/Units/Units.csproj b/csharp/Lib/Units/Units.csproj
index 4cedc809f..f750ccf47 100644
--- a/csharp/Lib/Units/Units.csproj
+++ b/csharp/Lib/Units/Units.csproj
@@ -6,7 +6,7 @@
     </ItemGroup>
 
     <ItemGroup>
-      <ProjectReference Include="..\Utils\Utils.csproj" />
+      <ProjectReference Include="../Utils/Utils.csproj" />
     </ItemGroup>
 
     <Target Name="PreBuild" BeforeTargets="PreBuildEvent">