diff --git a/EduNetworkBuilder/EduNetworkBuilder.csproj b/EduNetworkBuilder/EduNetworkBuilder.csproj
index 3f063e2..49d8b0b 100644
--- a/EduNetworkBuilder/EduNetworkBuilder.csproj
+++ b/EduNetworkBuilder/EduNetworkBuilder.csproj
@@ -70,6 +70,7 @@
   </PropertyGroup>
   <PropertyGroup />
   <ItemGroup>
+    <Reference Include="Microsoft.VisualBasic" />
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Security" />