Fix new Visual Studio warnings

Source/Boxed.AspNetCore.TagHelpers/OpenGraph/ObjectTypes/OpenGraphMetadata.cs

@@ -297,10 +297,7 @@ public virtual void ToString(StringBuilder stringBuilder)
             stringBuilder.AppendMetaPropertyContent("og:type", this.Type.ToLowercaseString());
         }
 
-        if (this.Url is null)
-        {
-            this.Url = this.GetRequestUrl();
-        }
+        this.Url ??= this.GetRequestUrl();
 
         stringBuilder.AppendMetaPropertyContent("og:url", this.Url);
 

Source/Boxed.AspNetCore/Middleware/HttpExceptionMiddleware.cs

@@ -11,7 +11,7 @@ namespace Boxed.AspNetCore.Middleware;
 /// The <see cref="HttpException"/> handling middleware.
 /// </summary>
 /// <seealso cref="IMiddleware" />
-internal class HttpExceptionMiddleware : IMiddleware
+public class HttpExceptionMiddleware : IMiddleware
 {
     private readonly RequestDelegate next;
     private readonly HttpExceptionMiddlewareOptions options;

Source/Boxed.DotnetNewTest/AsyncDisposableAction.cs

@@ -7,7 +7,7 @@ namespace Boxed.DotnetNewTest;
 /// Executes an asynchronous operation when disposed.
 /// </summary>
 /// <seealso cref="IAsyncDisposable" />
-internal class AsyncDisposableAction : IAsyncDisposable
+internal sealed class AsyncDisposableAction : IAsyncDisposable
 {
     private readonly Func<ValueTask> action;
 

Source/Boxed.DotnetNewTest/ConsoleColorScope.cs

@@ -6,7 +6,7 @@ namespace Boxed.DotnetNewTest;
 /// Sets the console foreground and/or background colour for the specified scope.
 /// </summary>
 /// <seealso cref="IDisposable" />
-internal class ConsoleColorScope : IDisposable
+internal sealed class ConsoleColorScope : IDisposable
 {
     private readonly ConsoleColor backgroundColor;
     private readonly ConsoleColor foregroundColor;

Tests/Boxed.AspNetCore.Swagger.Test/SchemaFilters/JsonPatchDocumentSchemaFilterTest.cs

@@ -50,7 +50,7 @@ public void Apply_TypeIsModelStateDictionary_DoesNothing()
     }
 
 #pragma warning disable CA1812 // Never instantiated
-    internal class Model
+    internal sealed class Model
 #pragma warning restore CA1812 // Never instantiated
     {
     }

Tests/Boxed.AspNetCore.TagHelpers.Test/SubresourceIntegrityTagHelperTest.cs

@@ -151,7 +151,7 @@ public async Task ProcessAsync_Sha256And384And512SriNotCached_CachesSriAndReturn
         Assert.Equal(expectedSri, htmlString.Value);
     }
 
-    internal class TestSubresourceIntegrityTagHelper : SubresourceIntegrityTagHelper
+    internal sealed class TestSubresourceIntegrityTagHelper : SubresourceIntegrityTagHelper
     {
         public TestSubresourceIntegrityTagHelper(
             IDistributedCache distributedCache,

Tests/Boxed.AspNetCore.Test/CursorTest.cs

@@ -242,7 +242,7 @@ public void ToCursor_NullableDateOnlyValue_ReturnsPrefixedBase64Cursor()
         Assert.Equal("MjAwMC0wMS0wMQ==", cursor);
     }
 
-    private class Item
+    private sealed class Item
     {
         public int Integer { get; set; }
     }

Tests/Boxed.AspNetCore.Test/DistributedCacheExtensionsTest.cs

@@ -32,7 +32,7 @@ public async Task GetAsJsonAsync_ValidValue_ReturnsDeserializedObjectAsync()
         {
             this.distributedCacheMock
                 .Setup(x => x.GetAsync("Key", cancellationTokenSource.Token))
-                .ReturnsAsync(Encoding.UTF8.GetBytes("{\"Value\":1}"));
+                .ReturnsAsync(Encoding.UTF8.GetBytes(/*lang=json,strict*/ "{\"Value\":1}"));
 
             var testClass = await this.distributedCacheMock.Object
                 .GetAsJsonAsync<TestClass>("Key", null, cancellationTokenSource.Token)
@@ -61,7 +61,7 @@ public async Task SetAsJsonAsync_ValidValue_SavesSerializedValueAsync()
             this.distributedCacheMock
                 .Setup(x => x.SetAsync(
                     "Key",
-                    It.Is<byte[]>(y => y.SequenceEqual(Encoding.UTF8.GetBytes("{\"Value\":1}"))),
+                    It.Is<byte[]>(y => y.SequenceEqual(Encoding.UTF8.GetBytes(/*lang=json,strict*/ "{\"Value\":1}"))),
                     null,
                     cancellationTokenSource.Token))
                 .Returns(Task.CompletedTask);
@@ -74,7 +74,7 @@ await this.distributedCacheMock.Object
 
     public void Dispose() => Mock.VerifyAll(this.distributedCacheMock);
 
-    internal class TestClass
+    internal sealed class TestClass
     {
         public int Value { get; set; }
     }

Tests/Boxed.AspNetCore.Test/Middleware/ServerTimingMiddlewareTest.cs

@@ -49,7 +49,7 @@ public async Task InvokeAsync_SupportsTrailingHeaders_AddsServerTimingHttpHeader
         Assert.Equal("app;dur=0.0", header.Value.ToString());
     }
 
-    internal class ResponseTrailersFeature : IHttpResponseTrailersFeature
+    internal sealed class ResponseTrailersFeature : IHttpResponseTrailersFeature
     {
         public IHeaderDictionary Trailers { get; set; } = new HeaderDictionary();
     }