Fix test issues

TestAssets/TestProjects/TestAppSimple/Program.cs

@@ -0,0 +1,23 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+
+namespace ConsoleApplication
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            Console.WriteLine("Hello World!");
+
+            if (args.Length > 0)
+            {
+                for (int i = 0; i < args.Length; i++)
+                {
+                    Console.WriteLine($"{i} = {args[i]}");
+                }
+            }
+        }
+    }
+}

TestAssets/TestProjects/TestAppSimple/TestAppSimple.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), testAsset.props))\testAsset.props" />
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp2.2</TargetFramework>
+    <OutputType>Exe</OutputType>
+  </PropertyGroup>
+</Project>