follow proxy settings

__tests__/sample-csproj/Program.cs

@@ -0,0 +1,14 @@
+using System;
+using Newtonsoft.Json;
+
+namespace sample_csproj
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            var json = JsonConvert.SerializeObject(new[] {"Hello", "World!" });
+            Console.WriteLine(json);
+        }
+    }
+}

__tests__/sample-csproj/runtimeconfig.template.json

@@ -0,0 +1,7 @@
+{
+  "runtimeOptions": {
+    "configProperties": {
+      "System.Globalization.Invariant": true
+    }
+  }
+}

__tests__/sample-csproj/sample.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <RootNamespace>sample_csproj</RootNamespace>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+  </ItemGroup>
+
+</Project>