Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/ModelBinding/ComplexModelBinderProvider.cs

@@ -0,0 +1,20 @@
+namespace System.Web.ModelBinding {
+
+    // Returns a binder that can bind ComplexModel objects.
+    public sealed class ComplexModelBinderProvider : ModelBinderProvider {
+
+        // This is really just a simple binder.
+        private static readonly SimpleModelBinderProvider _underlyingProvider = GetUnderlyingProvider();
+
+        public override IModelBinder GetBinder(ModelBindingExecutionContext modelBindingExecutionContext, ModelBindingContext bindingContext) {
+            return _underlyingProvider.GetBinder(modelBindingExecutionContext, bindingContext);
+        }
+
+        private static SimpleModelBinderProvider GetUnderlyingProvider() {
+            return new SimpleModelBinderProvider(typeof(ComplexModel), new ComplexModelBinder()) {
+                SuppressPrefixCheck = true
+            };
+        }
+
+    }
+}