Add support for TypeConverter (#10730)

* Add support for TypeConverter

Fixes: #8493
Fixes: #9632
Fixes: #9339
Fixes: #8385
Fixes: 10077

This fix adds support for type converters as well as a few other minor
things we were missing from binding. The key thing about supporting
conversions is that we new can support arbitrary types with `@bind`.
This means you can use it with generics, which is something many users
have tried.

Along with type converters we get Guid and TimeSpan from the BCL. The
BCL also includes converters for types we're less interested in like
`short`.

* Use correct NumberStyles

* Fix culture

* Core check

src/Components/Blazor/Build/src/targets/BuiltInBclLinkerDescriptor.xml

@@ -13,5 +13,9 @@
   <assembly fullname="System">
     <!-- Without this, [Required(typeof(bool), "true", "true", ErrorMessage = "...")] fails -->
     <type fullname="System.ComponentModel.BooleanConverter" />
+
+    <!-- TypeConverters are only used through reflection. These are two built-in TypeConverters that are useful. -->
+    <type fullname="System.ComponentModel.GuidConverter" />
+    <type fullname="System.ComponentModel.TimeSpanConverter" />
   </assembly>
 </linker>

src/Components/Components/ref/Microsoft.AspNetCore.Components.netstandard2.0.cs

@@ -155,14 +155,15 @@ public static partial class EventCallbackFactoryBinderExtensions
         public static Microsoft.AspNetCore.Components.EventCallback<Microsoft.AspNetCore.Components.UIChangeEventArgs> CreateBinder(this Microsoft.AspNetCore.Components.EventCallbackFactory factory, object receiver, System.Action<int> setter, int existingValue) { throw null; }
         public static Microsoft.AspNetCore.Components.EventCallback<Microsoft.AspNetCore.Components.UIChangeEventArgs> CreateBinder(this Microsoft.AspNetCore.Components.EventCallbackFactory factory, object receiver, System.Action<long> setter, long existingValue) { throw null; }
         public static Microsoft.AspNetCore.Components.EventCallback<Microsoft.AspNetCore.Components.UIChangeEventArgs> CreateBinder(this Microsoft.AspNetCore.Components.EventCallbackFactory factory, object receiver, System.Action<bool?> setter, bool? existingValue) { throw null; }
+        public static Microsoft.AspNetCore.Components.EventCallback<Microsoft.AspNetCore.Components.UIChangeEventArgs> CreateBinder(this Microsoft.AspNetCore.Components.EventCallbackFactory factory, object receiver, System.Action<System.DateTime?> setter, System.DateTime? existingValue) { throw null; }
         public static Microsoft.AspNetCore.Components.EventCallback<Microsoft.AspNetCore.Components.UIChangeEventArgs> CreateBinder(this Microsoft.AspNetCore.Components.EventCallbackFactory factory, object receiver, System.Action<decimal?> setter, decimal? existingValue) { throw null; }
         public static Microsoft.AspNetCore.Components.EventCallback<Microsoft.AspNetCore.Components.UIChangeEventArgs> CreateBinder(this Microsoft.AspNetCore.Components.EventCallbackFactory factory, object receiver, System.Action<double?> setter, double? existingValue) { throw null; }
         public static Microsoft.AspNetCore.Components.EventCallback<Microsoft.AspNetCore.Components.UIChangeEventArgs> CreateBinder(this Microsoft.AspNetCore.Components.EventCallbackFactory factory, object receiver, System.Action<int?> setter, int? existingValue) { throw null; }
         public static Microsoft.AspNetCore.Components.EventCallback<Microsoft.AspNetCore.Components.UIChangeEventArgs> CreateBinder(this Microsoft.AspNetCore.Components.EventCallbackFactory factory, object receiver, System.Action<long?> setter, long? existingValue) { throw null; }
         public static Microsoft.AspNetCore.Components.EventCallback<Microsoft.AspNetCore.Components.UIChangeEventArgs> CreateBinder(this Microsoft.AspNetCore.Components.EventCallbackFactory factory, object receiver, System.Action<float?> setter, float? existingValue) { throw null; }
         public static Microsoft.AspNetCore.Components.EventCallback<Microsoft.AspNetCore.Components.UIChangeEventArgs> CreateBinder(this Microsoft.AspNetCore.Components.EventCallbackFactory factory, object receiver, System.Action<float> setter, float existingValue) { throw null; }
         public static Microsoft.AspNetCore.Components.EventCallback<Microsoft.AspNetCore.Components.UIChangeEventArgs> CreateBinder(this Microsoft.AspNetCore.Components.EventCallbackFactory factory, object receiver, System.Action<string> setter, string existingValue) { throw null; }
-        public static Microsoft.AspNetCore.Components.EventCallback<Microsoft.AspNetCore.Components.UIChangeEventArgs> CreateBinder<T>(this Microsoft.AspNetCore.Components.EventCallbackFactory factory, object receiver, System.Action<T> setter, T existingValue) where T : struct, System.Enum { throw null; }
+        public static Microsoft.AspNetCore.Components.EventCallback<Microsoft.AspNetCore.Components.UIChangeEventArgs> CreateBinder<T>(this Microsoft.AspNetCore.Components.EventCallbackFactory factory, object receiver, System.Action<T> setter, T existingValue) { throw null; }
     }
     public static partial class EventCallbackFactoryUIEventArgsExtensions
     {