fix #216

src/Microsoft.AspNetCore.Blazor/Components/ComponentFactory.cs

@@ -56,7 +56,7 @@ namespace Microsoft.AspNetCore.Blazor.Components
         {
             // Do all the reflection up front
             var injectableProperties = type.GetTypeInfo()
-                .GetProperties(_injectablePropertyBindingFlags)
+                .GetPropertiesIncludingInherited(_injectablePropertyBindingFlags)
                 .Where(p => p.GetCustomAttribute<InjectAttribute>() != null);
             var injectables = injectableProperties.Select(property =>
             {

src/Microsoft.AspNetCore.Blazor/TypeInfoExtensions.cs

@@ -0,0 +1,22 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+
+namespace Microsoft.AspNetCore.Blazor
+{
+    public static class TypeInfoExtensions
+    {
+        public static IEnumerable<PropertyInfo> GetPropertiesIncludingInherited(this TypeInfo typeInfo, BindingFlags bindingFlags)
+        {
+            while (typeInfo != null)
+            {
+                var properties = typeInfo.GetProperties(bindingFlags)
+                    .Where(prop => prop.ReflectedType == prop.DeclaringType);
+                foreach (var property in properties)
+                    yield return property;
+
+                typeInfo = typeInfo.BaseType?.GetTypeInfo();
+            }
+        }
+    }
+}

test/Microsoft.AspNetCore.Blazor.Test/DependencyInjectionTest.cs

@@ -117,6 +117,20 @@ namespace Microsoft.AspNetCore.Blazor.Test
             Assert.Same(serviceInstance, instance.MyService);
         }
 
+        [Fact]
+        public void SetsPrivateInheritedInjectableProperties()
+        {
+            // Arrange
+            var serviceInstance = new MyServiceImplementation();
+            _serviceProvider.AddService<IMyService>(serviceInstance);
+
+            // Act
+            var instance = InstantiateComponent<HasInheritedPrivateInjectableProperty>();
+
+            // Assert
+            Assert.Same(serviceInstance, instance.PrivateMyService);
+        }
+
         private T InstantiateComponent<T>() where T: IComponent
             => _renderer.InstantiateComponent<T>();
 
@@ -143,6 +157,15 @@ namespace Microsoft.AspNetCore.Blazor.Test
             [Inject] public IMyService MyService { get; set; }
         }
 
+        class HasPrivateInjectableProperty : TestComponent
+        {
+            [Inject] private IMyService MyService { get; set; }
+
+            public IMyService PrivateMyService => MyService;
+        }
+
+        class HasInheritedPrivateInjectableProperty : HasPrivateInjectableProperty { }
+
         class HasManyInjectableProperties : TestComponent
         {
             [Inject] public IMyService PublicReadWrite { get; set; }