THRIFT-4990 Upgrade to .NET Core 3.1 (LTS)
Client: netstd
Patch: Jens Geyer

This closes #1961
diff --git a/tutorial/netstd/Interfaces/Interfaces.csproj b/tutorial/netstd/Interfaces/Interfaces.csproj
index 4ebeb4f..c8b2bd8 100644
--- a/tutorial/netstd/Interfaces/Interfaces.csproj
+++ b/tutorial/netstd/Interfaces/Interfaces.csproj
@@ -33,7 +33,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.ServiceModel.Primitives" Version="4.5.3" />
+    <PackageReference Include="System.ServiceModel.Primitives" Version="4.7.0" />
   </ItemGroup>
 
   <Target Name="PreBuild" BeforeTargets="_GenerateRestoreProjectSpec;Restore;Compile">