Move to dotnet cli for building, and .NET Core (netstandard1.0) as target platform (#1727)

Move to dotnet cli for building, and .NET Core (netstandard1.0) as target platform

This also updates the version number to 3.0.0-beta4

1 files changed, 2 insertions, 1 deletions

diff --git a/csharp/src/Google.Protobuf.Test/FieldCodecTest.cs b/csharp/src/Google.Protobuf.Test/FieldCodecTest.cs
index c616470e..0e2bad59 100644
--- a/csharp/src/Google.Protobuf.Test/FieldCodecTest.cs
+++ b/csharp/src/Google.Protobuf.Test/FieldCodecTest.cs
@@ -32,6 +32,7 @@
 
 using System.Collections.Generic;
 using System.IO;
+using System.Reflection;
 using Google.Protobuf.TestProtos;
 using NUnit.Framework;
 
@@ -162,7 +163,7 @@ namespace Google.Protobuf
                 codedOutput.Flush();
                 Assert.AreEqual(0, stream.Position);
                 Assert.AreEqual(0, codec.CalculateSizeWithTag(codec.DefaultValue));
-                if (typeof(T).IsValueType)
+                if (typeof(T).GetTypeInfo().IsValueType)
                 {
                     Assert.AreEqual(default(T), codec.DefaultValue);
                 }