Fix NRE in netstandard 1.x.

Author: yfakariya

src/MsgPack/ReflectionAbstractions.cs

@@ -212,7 +212,7 @@ public static MethodInfo GetRuntimeMethod( this Type source, string name, Type[]
 					);
 		}
 
-#else
+#else // NETSTANDARD1_1 || NETSTANDARD1_3
 		public static MethodInfo GetRuntimeMethod( this Type source, string name, Type[] parameters )
 		{
 			return
@@ -242,6 +242,13 @@ public static PropertyInfo GetRuntimeProperty( this Type source, string name )
 				);
 		}
 
+#if NET35 || SILVERLIGHT
+		public static IEnumerable<PropertyInfo> GetRuntimeProperties( this Type source )
+		{
+			return source.GetProperties( BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic );
+		}
+#endif // NET35 || SILVERLIGHT
+
 #if DEBUG
 		public static FieldInfo GetRuntimeField( this Type source, string name )
 		{

src/MsgPack/Serialization/Metadata/_MessagePackSerializer.cs

@@ -19,6 +19,7 @@
 #endregion -- License Terms --
 
 using System;
+using System.Linq;
 using System.Reflection;
 
 namespace MsgPack.Serialization.Metadata
@@ -27,8 +28,12 @@ namespace MsgPack.Serialization.Metadata
 	internal static class _MessagePackSerializer
 	{
 		// ReSharper disable InconsistentNaming
-		public static readonly MethodInfo Create1_Method = typeof( MessagePackSerializer ).GetRuntimeMethod( nameof( MessagePackSerializer.Create ), new[] { typeof( SerializationContext ) } );
+		public static readonly MethodInfo Create1_Method = typeof( MessagePackSerializer ).GetMethod( nameof( MessagePackSerializer.Create ), new[] { typeof( SerializationContext ) } );
 		// ReSharper restore InconsistentNaming
-		public static readonly PropertyInfo OwnerContext = typeof( MessagePackSerializer ).GetRuntimeProperty( nameof( MessagePackSerializer.OwnerContext ) );
+		public static readonly PropertyInfo OwnerContext =
+			typeof( MessagePackSerializer )
+			// Use LINQ to get non public property in netstandard 1.x
+			.GetRuntimeProperties()
+			.Single( p => p.Name == nameof( MessagePackSerializer.OwnerContext ) );
 	}
 }