Inspired by dotnet show (#386)

* Changed the order of the projects, Web first to infer as startup.

* Added encapsulated JSON serialization - and moved to System.Text.Json

* Refactored a few minor updates out

Co-authored-by: Eric Fleming <eric-fleming18@hotmail.com>

src/ApplicationCore/ApplicationCore.csproj

@@ -9,6 +9,7 @@
 		<PackageReference Include="Ardalis.GuardClauses" Version="1.5.0" />
 		<PackageReference Include="Ardalis.Specification" Version="3.0.0" />
 		<PackageReference Include="System.Security.Claims" Version="4.3.0" />
+		<PackageReference Include="System.Text.Json" Version="4.7.2" />
 	</ItemGroup>
 
 </Project>

src/ApplicationCore/Extensions/JsonExtensions.cs

@@ -0,0 +1,18 @@
+using System.Text.Json;
+
+namespace Microsoft.eShopWeb
+{
+    public static class JsonExtensions
+    {
+        private static readonly JsonSerializerOptions _jsonOptions = new JsonSerializerOptions
+        {
+            PropertyNameCaseInsensitive = true
+        };
+
+        public static T FromJson<T>(this string json) =>
+            JsonSerializer.Deserialize<T>(json, _jsonOptions);
+
+        public static string ToJson<T>(this T obj) =>
+            JsonSerializer.Serialize<T>(obj, _jsonOptions);
+    }
+}

src/Web/Startup.cs

@@ -172,16 +172,15 @@ namespace Microsoft.eShopWeb.Web
                 {
                     ResponseWriter = async (context, report) =>
                     {
-                        var result = JsonConvert.SerializeObject(
-                            new
+                        var result = new
+                        {
+                            status = report.Status.ToString(),
+                            errors = report.Entries.Select(e => new
                             {
-                                status = report.Status.ToString(),
-                                errors = report.Entries.Select(e => new
-                                {
-                                    key = e.Key,
-                                    value = Enum.GetName(typeof(HealthStatus), e.Value.Status)
-                                })
-                            });
+                                key = e.Key,
+                                value = Enum.GetName(typeof(HealthStatus), e.Value.Status)
+                            })
+                        }.ToJson();
                         context.Response.ContentType = MediaTypeNames.Application.Json;
                         await context.Response.WriteAsync(result);
                     }