Make attributes only available on netstandard

MvvmCross.Forms/AssemblyInfoAttributes.cs

@@ -1,6 +1,17 @@
-using Xamarin.Forms;
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MS-PL license.
+// See the LICENSE file in the project root for more information.
 
+using System.Runtime.CompilerServices;
+using Xamarin.Forms;
+
+[assembly: InternalsVisibleTo("MvvmCross.Forms.Platforms.Wpf")]
+
+[assembly: Xamarin.Forms.Internals.Preserve(AllMembers = true)]
+
+#if NETSTANDARD
 [assembly: XmlnsPrefix("http://mvvmcross.com/bind", "mvx")]
 [assembly: XmlnsDefinition("http://mvvmcross.com/bind", nameof(MvvmCross.Forms.Bindings))]
 [assembly: XmlnsDefinition("http://mvvmcross.com/bind", nameof(MvvmCross.Forms.Converters))]
 [assembly: XmlnsDefinition("http://mvvmcross.com/bind", nameof(MvvmCross.Forms.Views))]
+#endif

MvvmCross.Forms/Bindings/Target/MvxListViewItemClickPropertyTargetBinding.cs

@@ -49,6 +49,12 @@ private void HandleMyPropertyChanged(object sender, EventArgs e)
             var args = e as ItemTappedEventArgs;
             if (args == null) return;
 
+            if (view?.ItemClick == null)
+            {
+                MvxBindingLog.Error($"Error - ItemClick is null in {nameof(MvxListViewItemClickPropertyTargetBinding)}");
+                return;
+            }
+
             view.ItemClick.Execute(args.Item);
         }
 

MvvmCross.Forms/MvxFormsLog.cs

@@ -2,10 +2,8 @@
 // The .NET Foundation licenses this file to you under the MS-PL license.
 // See the LICENSE file in the project root for more information.
 
-using System.Runtime.CompilerServices;
 using MvvmCross.Logging;
 
-[assembly: InternalsVisibleTo("MvvmCross.Forms.Platforms.Wpf")]
 namespace MvvmCross.Forms
 {
     internal static class MvxFormsLog