Move core packages to netstandard2.0

src/Microsoft.AspNetCore.NodeServices.Sockets/PhysicalConnections/NamedPipeConnection.cs

@@ -18,11 +18,7 @@ namespace Microsoft.AspNetCore.NodeServices.Sockets.PhysicalConnections
                 PipeDirection.InOut,
                 PipeOptions.Asynchronous);
 
-#if NET451
-            _namedPipeClientStream.Connect();
-#else
             await _namedPipeClientStream.ConnectAsync().ConfigureAwait(false);
-#endif
 
             return _namedPipeClientStream;
         }

src/Microsoft.AspNetCore.NodeServices.Sockets/PhysicalConnections/StreamConnection.cs

@@ -11,9 +11,6 @@ namespace Microsoft.AspNetCore.NodeServices.Sockets.PhysicalConnections
 
         public static StreamConnection Create()
         {
-#if NET451
-            return new NamedPipeConnection();
-#else
             var useNamedPipes = System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(
                 System.Runtime.InteropServices.OSPlatform.Windows);
             if (useNamedPipes)
@@ -24,7 +21,6 @@ namespace Microsoft.AspNetCore.NodeServices.Sockets.PhysicalConnections
             {
                 return new UnixDomainSocketConnection();
             }
-#endif
         }
     }
 }

src/Microsoft.AspNetCore.NodeServices.Sockets/PhysicalConnections/UnixDomainSocketConnection.cs

@@ -10,16 +10,6 @@ namespace Microsoft.AspNetCore.NodeServices.Sockets.PhysicalConnections
         private NetworkStream _networkStream;
         private Socket _socket;
 
-#if NET451
-        public override Task<Stream> Open(string address)
-        {
-            // The 'null' assignments avoid the compiler warnings about unassigned fields.
-            // Note that this whole class isn't supported on .NET 4.5.1, since that's not cross-platform.
-            _networkStream = null;
-            _socket = null;
-            throw new System.PlatformNotSupportedException();
-        }
-#else
         public override async Task<Stream> Open(string address)
         {
             var endPoint = new UnixDomainSocketEndPoint("/tmp/" + address);
@@ -28,7 +18,6 @@ namespace Microsoft.AspNetCore.NodeServices.Sockets.PhysicalConnections
             _networkStream = new NetworkStream(_socket);
             return _networkStream;
         }
-#endif
 
         public override void Dispose()
         {

src/Microsoft.AspNetCore.NodeServices.Sockets/PhysicalConnections/UnixDomainSocketEndPoint.cs

@@ -59,11 +59,7 @@ namespace Microsoft.AspNetCore.NodeServices.Sockets.PhysicalConnections
             }
             else
             {
-#if NET451
-                _encodedPath = new byte[0];
-#else
                 _encodedPath = Array.Empty<byte>();
-#endif
                 _path = string.Empty;
             }
         }