Updated NUnit packages, removed NUnitLite added packages for dotnet and Visual Studio, changed dotnet command in buildall to dotnet test, and deleted Program.cs (because it's no longer required).

csharp/buildall.sh

@@ -14,4 +14,4 @@ echo Running tests.
 # If we want to test the .NET 4.5 version separately, we could
 # run Mono explicitly. However, we don't have any differences between
 # the .NET 4.5 and netstandard1.0 assemblies.
-dotnet run -c $CONFIG -f netcoreapp1.0 -p $SRC/Google.Protobuf.Test/Google.Protobuf.Test.csproj
+dotnet test -c $CONFIG -f netcoreapp1.0 $SRC/Google.Protobuf.Test/Google.Protobuf.Test.csproj

csharp/src/Google.Protobuf.Test/Google.Protobuf.Test.csproj

@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <OutputType>Exe</OutputType>
     <TargetFrameworks>net451;netcoreapp1.0</TargetFrameworks>
     <AssemblyOriginatorKeyFile>../../keys/Google.Protobuf.snk</AssemblyOriginatorKeyFile>
     <SignAssembly>true</SignAssembly>
@@ -14,8 +13,9 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="NUnit" Version="3.6.1" />
-    <PackageReference Include="NUnitLite" Version="3.6.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.5.0" />
+    <PackageReference Include="NUnit" Version="3.9.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="3.9.0" />
   </ItemGroup>
 
   <!-- 

csharp/src/Google.Protobuf.Test/Program.cs

@@ -1,48 +0,0 @@
-#region Copyright notice and license
-// Protocol Buffers - Google's data interchange format
-// Copyright 2017 Google Inc.  All rights reserved.
-// https://developers.google.com/protocol-buffers/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#endregion
-using NUnitLite;
-using System.Reflection;
-
-namespace Google.Protobuf.Test
-{
-    class Program
-    {
-        public static int Main(string[] args)
-        {
-            #if NET35
-                return new AutoRun(typeof(Program).Assembly).Execute(args);
-            #else
-                return new AutoRun(typeof(Program).GetTypeInfo().Assembly).Execute(args);
-            #endif
-        }
-    }
-}