diff --git a/src/Components/Blazor/Build/test/BindRazorIntegrationTest.cs b/src/Components/Blazor/Build/test/BindRazorIntegrationTest.cs
index 44541b890945..411b64984b9b 100644
--- a/src/Components/Blazor/Build/test/BindRazorIntegrationTest.cs
+++ b/src/Components/Blazor/Build/test/BindRazorIntegrationTest.cs
@@ -31,10 +31,10 @@ namespace Test
     public class MyComponent : ComponentBase
     {
         [Parameter]
-        int Value { get; set; }
+        public int Value { get; set; }
 
         [Parameter]
-        Action<int> ValueChanged { get; set; }
+        public Action<int> ValueChanged { get; set; }
     }
 }"));
 
@@ -105,10 +105,10 @@ namespace Test
     public class MyComponent : ComponentBase
     {
         [Parameter]
-        int Value { get; set; }
+        public int Value { get; set; }
 
         [Parameter]
-        Action<int> OnChanged { get; set; }
+        public Action<int> OnChanged { get; set; }
     }
 }"));
 
diff --git a/src/Components/Blazor/Build/test/ChildContentRazorIntegrationTest.cs b/src/Components/Blazor/Build/test/ChildContentRazorIntegrationTest.cs
index a34e0d1ebf9d..8ee3131c1b7d 100644
--- a/src/Components/Blazor/Build/test/ChildContentRazorIntegrationTest.cs
+++ b/src/Components/Blazor/Build/test/ChildContentRazorIntegrationTest.cs
@@ -25,7 +25,7 @@ protected override void BuildRenderTree(RenderTreeBuilder builder)
         }
 
         [Parameter]
-        RenderFragment ChildContent { get; set; }
+        public RenderFragment ChildContent { get; set; }
     }
 }
 ");
@@ -43,10 +43,10 @@ protected override void BuildRenderTree(RenderTreeBuilder builder)
         }
 
         [Parameter]
-        RenderFragment<string> ChildContent { get; set; }
+        public RenderFragment<string> ChildContent { get; set; }
 
         [Parameter]
-        string Value { get; set; }
+        public string Value { get; set; }
     }
 }
 ");
@@ -66,19 +66,19 @@ protected override void BuildRenderTree(RenderTreeBuilder builder)
         }
 
         [Parameter]
-        string Name { get; set; }
+        public string Name { get; set; }
 
         [Parameter]
-        RenderFragment<string> Header { get; set; }
+        public RenderFragment<string> Header { get; set; }
 
         [Parameter]
-        RenderFragment<string> ChildContent { get; set; }
+        public RenderFragment<string> ChildContent { get; set; }
 
         [Parameter]
-        RenderFragment Footer { get; set; }
+        public RenderFragment Footer { get; set; }
 
         [Parameter]
-        string Value { get; set; }
+        public string Value { get; set; }
     }
 }
 ");
diff --git a/src/Components/Blazor/Build/test/ComponentRenderingRazorIntegrationTest.cs b/src/Components/Blazor/Build/test/ComponentRenderingRazorIntegrationTest.cs
index a754d4249d3e..7ecb5e4554a3 100644
--- a/src/Components/Blazor/Build/test/ComponentRenderingRazorIntegrationTest.cs
+++ b/src/Components/Blazor/Build/test/ComponentRenderingRazorIntegrationTest.cs
@@ -62,10 +62,10 @@ public class SomeType
 
     public class MyComponent : ComponentBase
     {
-        [Parameter] int IntProperty { get; set; }
-        [Parameter] bool BoolProperty { get; set; }
-        [Parameter] string StringProperty { get; set; }
-        [Parameter] SomeType ObjectProperty { get; set; }
+        [Parameter] public int IntProperty { get; set; }
+        [Parameter] public bool BoolProperty { get; set; }
+        [Parameter] public string StringProperty { get; set; }
+        [Parameter] public SomeType ObjectProperty { get; set; }
     }
 }
 "));
@@ -135,7 +135,7 @@ namespace Test
     public class MyComponent : ComponentBase
     {
         [Parameter]
-        string StringProperty { get; set; }
+        public string StringProperty { get; set; }
     }
 }
 "));
@@ -208,7 +208,7 @@ namespace Test
     public class MyComponent : ComponentBase
     {
         [Parameter]
-        Action<UIMouseEventArgs> OnClick { get; set; }
+        public Action<UIMouseEventArgs> OnClick { get; set; }
     }
 }
 "));
@@ -253,7 +253,7 @@ namespace Test
     public class MyComponent : ComponentBase
     {
         [Parameter]
-        Action<UIEventArgs> OnClick { get; set; }
+        public Action<UIEventArgs> OnClick { get; set; }
     }
 }
 "));
@@ -298,7 +298,7 @@ namespace Test
     public class MyComponent : ComponentBase
     {
         [Parameter]
-        bool BoolProperty { get; set; }
+        public bool BoolProperty { get; set; }
     }
 }"));
 
@@ -326,10 +326,10 @@ namespace Test
     public class MyComponent : ComponentBase
     {
         [Parameter]
-        string MyAttr { get; set; }
+        public string MyAttr { get; set; }
 
         [Parameter]
-        RenderFragment ChildContent { get; set; }
+        public RenderFragment ChildContent { get; set; }
     }
 }
 "));
@@ -370,7 +370,7 @@ namespace Test
     public class MyComponent : ComponentBase
     {
         [Parameter]
-        RenderFragment ChildContent { get; set; }
+        public RenderFragment ChildContent { get; set; }
     }
 }
 "));
@@ -416,7 +416,7 @@ namespace Test
 {
     public class SurveyPrompt : ComponentBase
     {
-        [Parameter] private string Title { get; set; }
+        [Parameter] public string Title { get; set; }
     }
 }
 "));
@@ -508,7 +508,7 @@ namespace Test
     public class MyComponent : ComponentBase
     {
         [Parameter]
-        RenderFragment ChildContent { get; set; }
+        public RenderFragment ChildContent { get; set; }
     }
 }
 "));
@@ -571,9 +571,9 @@ namespace Test
 {
     public class Repeater : ComponentBase
     {
-        [Parameter] int Count { get; set; }
-        [Parameter] RenderFragment<string> Template { get; set; }
-        [Parameter] string Value { get; set; }
+        [Parameter] public int Count { get; set; }
+        [Parameter] public RenderFragment<string> Template { get; set; }
+        [Parameter] public string Value { get; set; }
 
         protected override void BuildRenderTree(RenderTreeBuilder builder)
         {
diff --git a/src/Components/Blazor/Build/test/DirectiveRazorIntegrationTest.cs b/src/Components/Blazor/Build/test/DirectiveRazorIntegrationTest.cs
index 2c610bcc95d4..856e6b457ccf 100644
--- a/src/Components/Blazor/Build/test/DirectiveRazorIntegrationTest.cs
+++ b/src/Components/Blazor/Build/test/DirectiveRazorIntegrationTest.cs
@@ -147,7 +147,7 @@ public void SupportsInjectDirective()
         public class TestLayout : IComponent
         {
             [Parameter]
-            RenderFragment Body { get; set; }
+            public RenderFragment Body { get; set; }
 
             public void Configure(RenderHandle renderHandle)
             {
diff --git a/src/Components/Blazor/Build/test/GenericComponentRazorIntegrationTest.cs b/src/Components/Blazor/Build/test/GenericComponentRazorIntegrationTest.cs
index f15420c12f02..ed03db31ab69 100644
--- a/src/Components/Blazor/Build/test/GenericComponentRazorIntegrationTest.cs
+++ b/src/Components/Blazor/Build/test/GenericComponentRazorIntegrationTest.cs
@@ -41,10 +41,10 @@ protected override void BuildRenderTree(RenderTreeBuilder builder)
         }
 
         [Parameter]
-        List<TItem> Items { get; set; }
+        public List<TItem> Items { get; set; }
 
         [Parameter]
-        RenderFragment<Context> ChildContent { get; set; }
+        public RenderFragment<Context> ChildContent { get; set; }
 
         public class Context
         {
@@ -70,13 +70,13 @@ protected override void BuildRenderTree(RenderTreeBuilder builder)
         }
 
         [Parameter]
-        TItem1 Item1 { get; set; }
+        public TItem1 Item1 { get; set; }
 
         [Parameter]
-        TItem2 Item2 { get; set; }
+        public TItem2 Item2 { get; set; }
 
         [Parameter]
-        TItem3 Item3 { get; set; }
+        public TItem3 Item3 { get; set; }
     }
 }
 ");
@@ -224,7 +224,7 @@ @typeparam TItem
 <GenericContext Items=""@MyItems"" @ref=""_my"" @ref:suppressField />
 
 @code {
-    [Parameter] List<TItem> MyItems { get; set; }
+    [Parameter] public List<TItem> MyItems { get; set; }
     GenericContext<TItem> _my;
     void Foo() { GC.KeepAlive(_my); }
 }");
diff --git a/src/Components/Blazor/Templates/src/content/BlazorWasm-CSharp/Client/Shared/SurveyPrompt.razor b/src/Components/Blazor/Templates/src/content/BlazorWasm-CSharp/Client/Shared/SurveyPrompt.razor
index 986d57321a02..5baad704a973 100644
--- a/src/Components/Blazor/Templates/src/content/BlazorWasm-CSharp/Client/Shared/SurveyPrompt.razor
+++ b/src/Components/Blazor/Templates/src/content/BlazorWasm-CSharp/Client/Shared/SurveyPrompt.razor
@@ -11,5 +11,5 @@
 
 @code {
     // Demonstrates how a parent component can supply parameters
-    [Parameter] string Title { get; set; }
+    [Parameter] public string Title { get; set; }
 }
diff --git a/src/Components/Blazor/testassets/StandaloneApp/Pages/FetchData.razor b/src/Components/Blazor/testassets/StandaloneApp/Pages/FetchData.razor
index 9024a800a71b..9a741bddfbbe 100644
--- a/src/Components/Blazor/testassets/StandaloneApp/Pages/FetchData.razor
+++ b/src/Components/Blazor/testassets/StandaloneApp/Pages/FetchData.razor
@@ -44,7 +44,7 @@ else
 }
 
 @code {
-    [Parameter] DateTime StartDate { get; set; }
+    [Parameter] public DateTime StartDate { get; set; }
 
     WeatherForecast[] forecasts;
 
diff --git a/src/Components/Components/ref/Microsoft.AspNetCore.Components.netstandard2.0.cs b/src/Components/Components/ref/Microsoft.AspNetCore.Components.netstandard2.0.cs
index c887990cdba7..93ae0a2b025b 100644
--- a/src/Components/Components/ref/Microsoft.AspNetCore.Components.netstandard2.0.cs
+++ b/src/Components/Components/ref/Microsoft.AspNetCore.Components.netstandard2.0.cs
@@ -401,7 +401,7 @@ public abstract partial class LayoutComponentBase : Microsoft.AspNetCore.Compone
     {
         protected LayoutComponentBase() { }
         [Microsoft.AspNetCore.Components.ParameterAttribute]
-        protected Microsoft.AspNetCore.Components.RenderFragment Body { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } }
+        public Microsoft.AspNetCore.Components.RenderFragment Body { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } }
     }
     [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
     public readonly partial struct MarkupString
diff --git a/src/Components/Components/src/LayoutComponentBase.cs b/src/Components/Components/src/LayoutComponentBase.cs
index b9c8672d86dd..2480cd2e188c 100644
--- a/src/Components/Components/src/LayoutComponentBase.cs
+++ b/src/Components/Components/src/LayoutComponentBase.cs
@@ -16,6 +16,6 @@ public abstract class LayoutComponentBase : ComponentBase
         /// Gets the content to be rendered inside the layout.
         /// </summary>
         [Parameter]
-        protected RenderFragment Body { get; private set; }
+        public RenderFragment Body { get; private set; }
     }
 }
diff --git a/src/Components/Components/test/Auth/AuthorizeViewTest.cs b/src/Components/Components/test/Auth/AuthorizeViewTest.cs
index 83cbbd417f78..d87eb9eaebb9 100644
--- a/src/Components/Components/test/Auth/AuthorizeViewTest.cs
+++ b/src/Components/Components/test/Auth/AuthorizeViewTest.cs
@@ -499,7 +499,7 @@ protected override void BuildRenderTree(RenderTreeBuilder builder)
         // recurse into all descendants because we're passing ChildContent
         class NeverReRenderComponent : ComponentBase
         {
-            [Parameter] RenderFragment ChildContent { get; set; }
+            [Parameter] public RenderFragment ChildContent { get; set; }
 
             protected override bool ShouldRender() => false;
 
diff --git a/src/Components/Components/test/CascadingParameterStateTest.cs b/src/Components/Components/test/CascadingParameterStateTest.cs
index 95d42dc24fac..5cb5988a925f 100644
--- a/src/Components/Components/test/CascadingParameterStateTest.cs
+++ b/src/Components/Components/test/CascadingParameterStateTest.cs
@@ -389,19 +389,19 @@ static CascadingValue<T> CreateCascadingValueComponent<T>(T value, string name =
             renderer.Dispatcher.InvokeAsync((Action)(() => supplier.SetParametersAsync(ParameterCollection.FromDictionary(supplierParams))));
             return supplier;
         }
-       
+
         class ComponentWithNoParams : TestComponentBase
         {
         }
 
         class ComponentWithNoCascadingParams : TestComponentBase
         {
-            [Parameter] bool SomeRegularParameter { get; set; }
+            [Parameter] public bool SomeRegularParameter { get; set; }
         }
 
         class ComponentWithCascadingParams : TestComponentBase
         {
-            [Parameter] bool RegularParam { get; set; }
+            [Parameter] public bool RegularParam { get; set; }
             [CascadingParameter] internal ValueType1 CascadingParam1 { get; set; }
             [CascadingParameter] internal ValueType2 CascadingParam2 { get; set; }
         }
diff --git a/src/Components/Components/test/CascadingParameterTest.cs b/src/Components/Components/test/CascadingParameterTest.cs
index 5f6a01e3649a..766a1bd3b440 100644
--- a/src/Components/Components/test/CascadingParameterTest.cs
+++ b/src/Components/Components/test/CascadingParameterTest.cs
@@ -381,7 +381,7 @@ class CascadingParameterConsumerComponent<T> : AutoRenderComponent
             public int NumRenders { get; private set; }
 
             [CascadingParameter] T CascadingParameter { get; set; }
-            [Parameter] string RegularParameter { get; set; }
+            [Parameter] public string RegularParameter { get; set; }
 
             public override async Task SetParametersAsync(ParameterCollection parameters)
             {
diff --git a/src/Components/Components/test/PageDisplayTest.cs b/src/Components/Components/test/PageDisplayTest.cs
index 8e834a7e4fbf..e73e7e708371 100644
--- a/src/Components/Components/test/PageDisplayTest.cs
+++ b/src/Components/Components/test/PageDisplayTest.cs
@@ -220,7 +220,7 @@ public void CanChangeDisplayedPageWithDifferentLayout()
         private class RootLayout : AutoRenderComponent
         {
             [Parameter]
-            RenderFragment Body { get; set; }
+            public RenderFragment Body { get; set; }
 
             protected override void BuildRenderTree(RenderTreeBuilder builder)
             {
@@ -234,7 +234,7 @@ protected override void BuildRenderTree(RenderTreeBuilder builder)
         private class NestedLayout : AutoRenderComponent
         {
             [Parameter]
-            RenderFragment Body { get; set; }
+            public RenderFragment Body { get; set; }
 
             protected override void BuildRenderTree(RenderTreeBuilder builder)
             {
diff --git a/src/Components/Components/test/ParameterCollectionAssignmentExtensionsTest.cs b/src/Components/Components/test/ParameterCollectionAssignmentExtensionsTest.cs
index 719308188827..8b21a70c5065 100644
--- a/src/Components/Components/test/ParameterCollectionAssignmentExtensionsTest.cs
+++ b/src/Components/Components/test/ParameterCollectionAssignmentExtensionsTest.cs
@@ -364,11 +364,11 @@ class HasInstanceProperties
             // "internal" to show we're not requiring public accessors, but also
             // to keep the assertions simple in the tests
 
-            [Parameter] internal int IntProp { get; set; }
-            [Parameter] internal string StringProp { get; set; }
+            [Parameter] public int IntProp { get; set; }
+            [Parameter] public string StringProp { get; set; }
 
             // Also a truly private one to show there's nothing special about 'internal'
-            [Parameter] private object ObjectProp { get; set; }
+            [Parameter] public object ObjectProp { get; set; }
 
             public static string ObjectPropName => nameof(ObjectProp);
             public object ObjectPropCurrentValue
@@ -386,7 +386,7 @@ class HasPropertyWithoutParameterAttribute
         class HasPropertyWhoseSetterThrows
         {
             [Parameter]
-            internal string StringProp
+            public string StringProp
             {
                 get => string.Empty;
                 set => throw new InvalidOperationException("This setter throws");
@@ -395,37 +395,37 @@ internal string StringProp
 
         class HasInheritedProperties : HasInstanceProperties
         {
-            [Parameter] internal int DerivedClassIntProp { get; set; }
+            [Parameter] public int DerivedClassIntProp { get; set; }
         }
 
         class HasParametersVaryingOnlyByCase
         {
-            [Parameter] internal object MyValue { get; set; }
-            [Parameter] internal object Myvalue { get; set; }
+            [Parameter] public object MyValue { get; set; }
+            [Parameter] public object Myvalue { get; set; }
         }
 
         class HasParameterClashingWithInherited : HasInstanceProperties
         {
-            [Parameter] new int IntProp { get; set; }
+            [Parameter] public new int IntProp { get; set; }
         }
 
         class HasCaptureUnmatchedValuesProperty
         {
-            [Parameter] internal int IntProp { get; set; }
-            [Parameter] internal string StringProp { get; set; }
-            [Parameter] internal object ObjectProp { get; set; }
-            [Parameter(CaptureUnmatchedValues = true)] internal IReadOnlyDictionary<string, object> CaptureUnmatchedValues { get; set; }
+            [Parameter] public int IntProp { get; set; }
+            [Parameter] public string StringProp { get; set; }
+            [Parameter] public object ObjectProp { get; set; }
+            [Parameter(CaptureUnmatchedValues = true)] public IReadOnlyDictionary<string, object> CaptureUnmatchedValues { get; set; }
         }
 
         class HasDupliateCaptureUnmatchedValuesProperty
         {
-            [Parameter(CaptureUnmatchedValues = true)] internal Dictionary<string, object> CaptureUnmatchedValuesProp1 { get; set; }
-            [Parameter(CaptureUnmatchedValues = true)] internal IDictionary<string, object> CaptureUnmatchedValuesProp2 { get; set; }
+            [Parameter(CaptureUnmatchedValues = true)] public Dictionary<string, object> CaptureUnmatchedValuesProp1 { get; set; }
+            [Parameter(CaptureUnmatchedValues = true)] public IDictionary<string, object> CaptureUnmatchedValuesProp2 { get; set; }
         }
 
         class HasWrongTypeCaptureUnmatchedValuesProperty
         {
-            [Parameter(CaptureUnmatchedValues = true)] internal KeyValuePair<string, object>[] CaptureUnmatchedValuesProp { get; set; }
+            [Parameter(CaptureUnmatchedValues = true)] public KeyValuePair<string, object>[] CaptureUnmatchedValuesProp { get; set; }
         }
 
         class ParameterCollectionBuilder : IEnumerable
diff --git a/src/Components/Components/test/RenderTreeDiffBuilderTest.cs b/src/Components/Components/test/RenderTreeDiffBuilderTest.cs
index 6a9d9e9b1500..b54f6b86ad71 100644
--- a/src/Components/Components/test/RenderTreeDiffBuilderTest.cs
+++ b/src/Components/Components/test/RenderTreeDiffBuilderTest.cs
@@ -2205,19 +2205,19 @@ protected override Task UpdateDisplayAsync(in RenderBatch renderBatch)
         private class FakeComponent : IComponent
         {
             [Parameter]
-            internal int IntProperty { get; set; }
+            public int IntProperty { get; set; }
 
             [Parameter]
-            internal string StringProperty { get; set; }
+            public string StringProperty { get; set; }
 
             [Parameter]
-            internal object ObjectProperty { get; set; }
+            public object ObjectProperty { get; set; }
 
             [Parameter]
-            internal string ReadonlyProperty { get; private set; }
+            public string ReadonlyProperty { get; private set; }
 
             [Parameter]
-            string PrivateProperty { get; set; }
+            public string PrivateProperty { get; set; }
 
             public string NonParameterProperty { get; set; }
 
diff --git a/src/Components/Components/test/RendererTest.cs b/src/Components/Components/test/RendererTest.cs
index 5b4baef88ce7..d7d8e8e59a4d 100644
--- a/src/Components/Components/test/RendererTest.cs
+++ b/src/Components/Components/test/RendererTest.cs
@@ -3434,7 +3434,7 @@ public void TriggerRender()
         private class MessageComponent : AutoRenderComponent
         {
             [Parameter]
-            internal string Message { get; set; }
+            public string Message { get; set; }
 
             protected override void BuildRenderTree(RenderTreeBuilder builder)
             {
@@ -3444,9 +3444,9 @@ protected override void BuildRenderTree(RenderTreeBuilder builder)
 
         private class MyStrongComponent : AutoRenderComponent
         {
-            [Parameter(CaptureUnmatchedValues = true)] internal IDictionary<string, object> Attributes { get; set; }
+            [Parameter(CaptureUnmatchedValues = true)] public IDictionary<string, object> Attributes { get; set; }
 
-            [Parameter] internal string Text { get; set; }
+            [Parameter] public string Text { get; set; }
 
             protected override void BuildRenderTree(RenderTreeBuilder builder)
             {
@@ -3460,13 +3460,13 @@ protected override void BuildRenderTree(RenderTreeBuilder builder)
         private class FakeComponent : IComponent
         {
             [Parameter]
-            internal int IntProperty { get; private set; }
+            public int IntProperty { get; private set; }
 
             [Parameter]
-            internal string StringProperty { get; private set; }
+            public string StringProperty { get; private set; }
 
             [Parameter]
-            internal object ObjectProperty { get; set; }
+            public object ObjectProperty { get; set; }
 
             public RenderHandle RenderHandle { get; private set; }
 
@@ -3483,28 +3483,28 @@ public Task SetParametersAsync(ParameterCollection parameters)
         private class EventComponent : AutoRenderComponent, IComponent, IHandleEvent
         {
             [Parameter]
-            internal Action<UIEventArgs> OnTest { get; set; }
+            public Action<UIEventArgs> OnTest { get; set; }
 
             [Parameter]
-            internal Func<UIEventArgs, Task> OnTestAsync { get; set; }
+            public Func<UIEventArgs, Task> OnTestAsync { get; set; }
 
             [Parameter]
-            internal Action<UIMouseEventArgs> OnClick { get; set; }
+            public Action<UIMouseEventArgs> OnClick { get; set; }
 
             [Parameter]
-            internal Func<UIMouseEventArgs, Task> OnClickAsync { get; set; }
+            public Func<UIMouseEventArgs, Task> OnClickAsync { get; set; }
 
             [Parameter]
-            internal Action OnClickAction { get; set; }
+            public Action OnClickAction { get; set; }
 
             [Parameter]
-            internal Func<Task> OnClickAsyncAction { get; set; }
+            public Func<Task> OnClickAsyncAction { get; set; }
 
             [Parameter]
-            internal EventCallback OnClickEventCallback { get; set; }
+            public EventCallback OnClickEventCallback { get; set; }
 
             [Parameter]
-            internal EventCallback<UIMouseEventArgs> OnClickEventCallbackOfT { get; set; }
+            public EventCallback<UIMouseEventArgs> OnClickEventCallbackOfT { get; set; }
 
             public bool SkipElement { get; set; }
             private int renderCount = 0;
@@ -3568,10 +3568,10 @@ public Task HandleEventAsync(EventCallbackWorkItem callback, object arg)
         private class ConditionalParentComponent<T> : AutoRenderComponent where T : IComponent
         {
             [Parameter]
-            internal bool IncludeChild { get; set; }
+            public bool IncludeChild { get; set; }
 
             [Parameter]
-            internal IDictionary<string, object> ChildParameters { get; set; }
+            public IDictionary<string, object> ChildParameters { get; set; }
 
             protected override void BuildRenderTree(RenderTreeBuilder builder)
             {
@@ -3596,7 +3596,7 @@ protected override void BuildRenderTree(RenderTreeBuilder builder)
         private class ReRendersParentComponent : AutoRenderComponent
         {
             [Parameter]
-            internal TestComponent Parent { get; private set; }
+            public TestComponent Parent { get; private set; }
 
             private bool _isFirstTime = true;
 
@@ -3615,7 +3615,7 @@ protected override void BuildRenderTree(RenderTreeBuilder builder)
         private class RendersSelfAfterEventComponent : IComponent, IHandleEvent
         {
             [Parameter]
-            Action<object> OnClick { get; set; }
+            public Action<object> OnClick { get; set; }
 
             private RenderHandle _renderHandle;
 
diff --git a/src/Components/test/testassets/BasicTestApp/BindGenericComponent.razor b/src/Components/test/testassets/BasicTestApp/BindGenericComponent.razor
index 54072b918eb7..1b660bc859ae 100644
--- a/src/Components/test/testassets/BasicTestApp/BindGenericComponent.razor
+++ b/src/Components/test/testassets/BasicTestApp/BindGenericComponent.razor
@@ -3,7 +3,7 @@
 <input id="@Id" type="text" value="@Value" @onchange="@(EventCallback.Factory.CreateBinder<TValue>(this, _ => ValueChanged.InvokeAsync(_), Value))" />
 
 @code {
-    [Parameter] string Id { get; set; }
-    [Parameter] TValue Value { get; set; }
-    [Parameter] EventCallback<TValue> ValueChanged { get; set; }
+    [Parameter] public string Id { get; set; }
+    [Parameter] public TValue Value { get; set; }
+    [Parameter] public EventCallback<TValue> ValueChanged { get; set; }
 }
diff --git a/src/Components/test/testassets/BasicTestApp/EventCallbackTest/ButtonComponent.razor b/src/Components/test/testassets/BasicTestApp/EventCallbackTest/ButtonComponent.razor
index 5a3168666926..2aa00c2ed68a 100644
--- a/src/Components/test/testassets/BasicTestApp/EventCallbackTest/ButtonComponent.razor
+++ b/src/Components/test/testassets/BasicTestApp/EventCallbackTest/ButtonComponent.razor
@@ -2,9 +2,9 @@
 <button @onclick="OnClick">@Text</button>
 
 @code {
-    [Parameter] int Count { get; set; }
-    [Parameter] EventCallback<int> CountChanged { get; set; }
-    [Parameter] string Text { get; set; }
+    [Parameter] public int Count { get; set; }
+    [Parameter] public EventCallback<int> CountChanged { get; set; }
+    [Parameter] public string Text { get; set; }
 
     Task OnClick(UIMouseEventArgs e)
     {
diff --git a/src/Components/test/testassets/BasicTestApp/EventCallbackTest/InnerButton.razor b/src/Components/test/testassets/BasicTestApp/EventCallbackTest/InnerButton.razor
index ab579dcb0196..9e14850b077f 100644
--- a/src/Components/test/testassets/BasicTestApp/EventCallbackTest/InnerButton.razor
+++ b/src/Components/test/testassets/BasicTestApp/EventCallbackTest/InnerButton.razor
@@ -2,6 +2,6 @@
 <button @onclick="OnClick">@Text</button>
 
 @code {
-    [Parameter] EventCallback OnClick { get; set; }
-    [Parameter] string Text { get; set; }
+    [Parameter] public EventCallback OnClick { get; set; }
+    [Parameter] public string Text { get; set; }
 }
diff --git a/src/Components/test/testassets/BasicTestApp/EventCallbackTest/MiddleButton.razor b/src/Components/test/testassets/BasicTestApp/EventCallbackTest/MiddleButton.razor
index 33294d11b77c..bcca360135d9 100644
--- a/src/Components/test/testassets/BasicTestApp/EventCallbackTest/MiddleButton.razor
+++ b/src/Components/test/testassets/BasicTestApp/EventCallbackTest/MiddleButton.razor
@@ -2,6 +2,6 @@
 <InnerButton OnClick="@OnClick" Text="@Text"/>
 
 @code {
-    [Parameter] EventCallback OnClick { get; set; }
-    [Parameter] string Text { get; set; }
+    [Parameter] public EventCallback OnClick { get; set; }
+    [Parameter] public string Text { get; set; }
 }
diff --git a/src/Components/test/testassets/BasicTestApp/EventCallbackTest/StronglyTypedButton.razor b/src/Components/test/testassets/BasicTestApp/EventCallbackTest/StronglyTypedButton.razor
index 6dc6b04f9154..ca89f8a576bd 100644
--- a/src/Components/test/testassets/BasicTestApp/EventCallbackTest/StronglyTypedButton.razor
+++ b/src/Components/test/testassets/BasicTestApp/EventCallbackTest/StronglyTypedButton.razor
@@ -2,6 +2,6 @@
 <button @onclick="OnClick">@Text</button>
 
 @code {
-    [Parameter] EventCallback<UIMouseEventArgs> OnClick { get; set; }
-    [Parameter] string Text { get; set; }
+    [Parameter] public EventCallback<UIMouseEventArgs> OnClick { get; set; }
+    [Parameter] public string Text { get; set; }
 }
diff --git a/src/Components/test/testassets/BasicTestApp/EventCallbackTest/TemplatedControl.razor b/src/Components/test/testassets/BasicTestApp/EventCallbackTest/TemplatedControl.razor
index c200183f3ffd..f32acd10457f 100644
--- a/src/Components/test/testassets/BasicTestApp/EventCallbackTest/TemplatedControl.razor
+++ b/src/Components/test/testassets/BasicTestApp/EventCallbackTest/TemplatedControl.razor
@@ -4,5 +4,5 @@
 </div>
 
 @code {
-    [Parameter] RenderFragment ChildContent { get; set; }
+    [Parameter] public RenderFragment ChildContent { get; set; }
 }
diff --git a/src/Components/test/testassets/BasicTestApp/KeyCasesTreeNode.razor b/src/Components/test/testassets/BasicTestApp/KeyCasesTreeNode.razor
index 340e1046cd28..dcc321eaf62f 100644
--- a/src/Components/test/testassets/BasicTestApp/KeyCasesTreeNode.razor
+++ b/src/Components/test/testassets/BasicTestApp/KeyCasesTreeNode.razor
@@ -43,7 +43,7 @@
     string instanceId = Guid.NewGuid().ToString("D").Substring(0, 6);
     int firstCreatedOnUpdateCount;
 
-    [Parameter] Node Data { get; set; }
+    [Parameter] public Node Data { get; set; }
     [CascadingParameter] KeyCasesComponent.RenderContext RenderContext { get; set; }
 
     protected override void OnInitialized()
diff --git a/src/Components/test/testassets/BasicTestApp/MessageComponent.razor b/src/Components/test/testassets/BasicTestApp/MessageComponent.razor
index 889c9385175a..e20b7d864e45 100644
--- a/src/Components/test/testassets/BasicTestApp/MessageComponent.razor
+++ b/src/Components/test/testassets/BasicTestApp/MessageComponent.razor
@@ -1,4 +1,4 @@
 <span style="color: red" class="message">@Message</span>
 @code {
-    [Parameter] string Message { get; set; }
+    [Parameter] public string Message { get; set; }
 }
diff --git a/src/Components/test/testassets/BasicTestApp/OrderedList.razor b/src/Components/test/testassets/BasicTestApp/OrderedList.razor
index c212f194d65c..2e832207bc71 100644
--- a/src/Components/test/testassets/BasicTestApp/OrderedList.razor
+++ b/src/Components/test/testassets/BasicTestApp/OrderedList.razor
@@ -11,9 +11,9 @@
 </ol>
 
 @code{
-    [Parameter] IEnumerable<TItem> Items { get; set; }
+    [Parameter] public IEnumerable<TItem> Items { get; set; }
 
-    [Parameter] RenderFragment<Context> Template { get; set; }
+    [Parameter] public RenderFragment<Context> Template { get; set; }
 
     public class Context
     {
diff --git a/src/Components/test/testassets/BasicTestApp/PassThroughContentComponent.razor b/src/Components/test/testassets/BasicTestApp/PassThroughContentComponent.razor
index 8ab805ed1b24..5ab909caba0a 100644
--- a/src/Components/test/testassets/BasicTestApp/PassThroughContentComponent.razor
+++ b/src/Components/test/testassets/BasicTestApp/PassThroughContentComponent.razor
@@ -3,5 +3,5 @@
     // Note: The lack of any whitespace or other output besides @ChildContent is important for
     // what scenarios this component is used for in E2E tests.
 
-    [Parameter] RenderFragment ChildContent { get; set; }
+    [Parameter] public RenderFragment ChildContent { get; set; }
 }
diff --git a/src/Components/test/testassets/BasicTestApp/PropertiesChangedHandlerChild.razor b/src/Components/test/testassets/BasicTestApp/PropertiesChangedHandlerChild.razor
index f359d6c326ba..131b5c6ff939 100644
--- a/src/Components/test/testassets/BasicTestApp/PropertiesChangedHandlerChild.razor
+++ b/src/Components/test/testassets/BasicTestApp/PropertiesChangedHandlerChild.razor
@@ -3,7 +3,7 @@
 
 @code {
     [Parameter]
-    int SuppliedValue { get; set; }
+    public int SuppliedValue { get; set; }
 
     private int computedValue;
 
diff --git a/src/Components/test/testassets/BasicTestApp/RouterTest/WithNumberParameters.razor b/src/Components/test/testassets/BasicTestApp/RouterTest/WithNumberParameters.razor
index 67ffca877091..97d8559f9ec7 100644
--- a/src/Components/test/testassets/BasicTestApp/RouterTest/WithNumberParameters.razor
+++ b/src/Components/test/testassets/BasicTestApp/RouterTest/WithNumberParameters.razor
@@ -3,9 +3,9 @@
 
 @code
 {
-    [Parameter] int TestInt { get; set; }
-    [Parameter] long TestLong { get; set; }
-    [Parameter] double TestDouble { get; set; }
-    [Parameter] float TestFloat { get; set; }
-    [Parameter] decimal TestDec { get; set; }
+    [Parameter] public int TestInt { get; set; }
+    [Parameter] public long TestLong { get; set; }
+    [Parameter] public double TestDouble { get; set; }
+    [Parameter] public float TestFloat { get; set; }
+    [Parameter] public decimal TestDec { get; set; }
 }
diff --git a/src/Components/test/testassets/BasicTestApp/RouterTest/WithParameters.razor b/src/Components/test/testassets/BasicTestApp/RouterTest/WithParameters.razor
index e13b253ff1bb..8b242ccbd296 100644
--- a/src/Components/test/testassets/BasicTestApp/RouterTest/WithParameters.razor
+++ b/src/Components/test/testassets/BasicTestApp/RouterTest/WithParameters.razor
@@ -5,9 +5,9 @@
 
 @code
 {
-    [Parameter] string FirstName { get; set; }
+    [Parameter] public string FirstName { get; set; }
 
-    [Parameter] string LastName { get ; set; }
+    [Parameter] public string LastName { get ; set; }
 
     public override Task SetParametersAsync(ParameterCollection parameters)
     {
diff --git a/src/Components/test/testassets/BasicTestApp/TemplatedTable.razor b/src/Components/test/testassets/BasicTestApp/TemplatedTable.razor
index 18ea949f31fe..941a6532cf99 100644
--- a/src/Components/test/testassets/BasicTestApp/TemplatedTable.razor
+++ b/src/Components/test/testassets/BasicTestApp/TemplatedTable.razor
@@ -22,14 +22,14 @@
 
 @code {
     [Parameter]
-    RenderFragment Header { get; set; }
+    public RenderFragment Header { get; set; }
 
     [Parameter]
-    RenderFragment<TItem> ItemTemplate { get; set; }
+    public RenderFragment<TItem> ItemTemplate { get; set; }
 
     [Parameter]
-    RenderFragment Footer { get; set; }
+    public RenderFragment Footer { get; set; }
 
     [Parameter]
-    IReadOnlyList<TItem> Items { get; set; }
+    public IReadOnlyList<TItem> Items { get; set; }
 }
diff --git a/src/Components/test/testassets/ComponentsApp.App/Pages/FetchData.razor b/src/Components/test/testassets/ComponentsApp.App/Pages/FetchData.razor
index cdc696a7cef0..239e35cb8c58 100644
--- a/src/Components/test/testassets/ComponentsApp.App/Pages/FetchData.razor
+++ b/src/Components/test/testassets/ComponentsApp.App/Pages/FetchData.razor
@@ -44,7 +44,7 @@ else
 }
 
 @code {
-    [Parameter] DateTime StartDate { get; set; }
+    [Parameter] public DateTime StartDate { get; set; }
 
     WeatherForecast[] forecasts;
 
diff --git a/src/Mvc/Mvc.Components.Prerendering/test/HtmlHelperComponentPrerenderingExtensionsTests.cs b/src/Mvc/Mvc.Components.Prerendering/test/HtmlHelperComponentPrerenderingExtensionsTests.cs
index 411a87a50b29..b8f41d8a3025 100644
--- a/src/Mvc/Mvc.Components.Prerendering/test/HtmlHelperComponentPrerenderingExtensionsTests.cs
+++ b/src/Mvc/Mvc.Components.Prerendering/test/HtmlHelperComponentPrerenderingExtensionsTests.cs
@@ -305,9 +305,9 @@ protected override void OnInitialized()
 
         private class ExceptionComponent : ComponentBase
         {
-            [Parameter] bool IsAsync { get; set; }
+            [Parameter] public bool IsAsync { get; set; }
 
-            [Parameter] bool JsInterop { get; set; }
+            [Parameter] public bool JsInterop { get; set; }
 
             [Inject] IJSRuntime JsRuntime { get; set; }
 
diff --git a/src/Mvc/Mvc.ViewFeatures/test/HtmlHelperComponentExtensionsTests.cs b/src/Mvc/Mvc.ViewFeatures/test/HtmlHelperComponentExtensionsTests.cs
index 1034200ddd18..14ca9e44d94d 100644
--- a/src/Mvc/Mvc.ViewFeatures/test/HtmlHelperComponentExtensionsTests.cs
+++ b/src/Mvc/Mvc.ViewFeatures/test/HtmlHelperComponentExtensionsTests.cs
@@ -285,9 +285,9 @@ protected override void OnInitialized()
 
         private class ExceptionComponent : ComponentBase
         {
-            [Parameter] bool IsAsync { get; set; }
+            [Parameter] public bool IsAsync { get; set; }
 
-            [Parameter] bool JsInterop { get; set; }
+            [Parameter] public bool JsInterop { get; set; }
 
             [Inject] IJSRuntime JsRuntime { get; set; }
 
diff --git a/src/Mvc/test/WebSites/BasicWebSite/RazorComponents/FetchData.razor b/src/Mvc/test/WebSites/BasicWebSite/RazorComponents/FetchData.razor
index 3ed6d5d97980..dd95e4f24547 100644
--- a/src/Mvc/test/WebSites/BasicWebSite/RazorComponents/FetchData.razor
+++ b/src/Mvc/test/WebSites/BasicWebSite/RazorComponents/FetchData.razor
@@ -36,7 +36,7 @@ else
 }
 
 @code {
-    [Parameter] DateTime StartDate { get; set; }
+    [Parameter] public DateTime StartDate { get; set; }
 
     WeatherForecast[] forecasts;