Fix Issue with Serializing Type When Using System.Text.Json

Directory.Packages.props

@@ -17,6 +17,7 @@
     <PackageVersion Include="Swashbuckle.AspNetCore.Annotations" Version="6.5.0" />
     <PackageVersion Include="System.ComponentModel.Annotations" Version="5.0.0" />
     <PackageVersion Include="System.Runtime" Version="4.3.1" />
+    <PackageVersion Include="System.Text.Json" Version="7.0.3" />
     <PackageVersion Include="xunit" Version="2.4.2" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.4.5" />
   </ItemGroup>

src/Ardalis.Result/Ardalis.Result.csproj

@@ -14,4 +14,7 @@
   <ItemGroup>
     <None Include="icon.png" Pack="true" Visible="false" PackagePath="" />
   </ItemGroup>
+  <ItemGroup Condition="$(TargetFramework) == 'netstandard2.0'">
+    <PackageReference Include="System.Text.Json" />
+  </ItemGroup>
 </Project>

src/Ardalis.Result/Result.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Text.Json.Serialization;
 
 namespace Ardalis.Result
 {
@@ -10,10 +11,6 @@ protected Result() { }
         public Result(T value)
         {
             Value = value;
-            if (Value != null)
-            {
-                ValueType = Value.GetType();
-            }
         }
 
         protected internal Result(T value, string successMessage) : this(value)
@@ -40,16 +37,15 @@ protected Result(ResultStatus status)
 
         public T Value { get; }
 
-        public Type ValueType { get; private set; }
+        [JsonIgnore]
+        public Type ValueType => typeof(T);
         public ResultStatus Status { get; protected set; } = ResultStatus.Ok;
         public bool IsSuccess => Status == ResultStatus.Ok;
         public string SuccessMessage { get; protected set; } = string.Empty;
         public string CorrelationId { get; protected set; } = string.Empty;
         public IEnumerable<string> Errors { get; protected set; } = new List<string>();
         public List<ValidationError> ValidationErrors { get; protected set; } = new List<ValidationError>();
 
-        public void ClearValueType() => ValueType = null;
-
         /// <summary>
         /// Returns the current value.
         /// </summary>

tests/Ardalis.Result.UnitTests/SystemTextJsonSerializer.cs

@@ -0,0 +1,57 @@
+using System.Text.Json;
+using Xunit;
+
+namespace Ardalis.Result.UnitTests
+{
+    public class SystemTextJsonSerializer
+    {
+        [Fact]
+        public void ShouldSerializeResultOfValueType()
+        {
+            var result = Result.Success(5);
+            string expected = "{\"Value\":5,\"Status\":0,\"IsSuccess\":true,\"SuccessMessage\":\"\",\"CorrelationId\":\"\",\"Errors\":[],\"ValidationErrors\":[]}";
+
+            var json = JsonSerializer.Serialize(result);
+
+            Assert.Equal(expected, json);
+        }
+
+        [Fact]
+        public void ShouldSerializeResultOfReferenceType()
+        {
+            var result = Result.Success(new Foo { Bar = "Result!" });
+            string expected = "{\"Value\":{\"Bar\":\"Result!\"},\"Status\":0,\"IsSuccess\":true,\"SuccessMessage\":\"\",\"CorrelationId\":\"\",\"Errors\":[],\"ValidationErrors\":[]}";
+
+            var json = JsonSerializer.Serialize(result);
+
+            Assert.Equal(expected, json);
+        }
+
+        [Fact]
+        public void ShouldDeserializeResultOfValueType()
+        {
+            var expected = Result.Success(10);
+            string json = "{\"Value\":10,\"Status\":0,\"IsSuccess\":true,\"SuccessMessage\":\"\",\"CorrelationId\":\"\",\"Errors\":[],\"ValidationErrors\":[]}";
+
+            var result = JsonSerializer.Deserialize<Result<int>>(json);
+
+            Assert.Equivalent(expected, result);
+        }
+
+        [Fact]
+        public void ShouldDeserializeResultOfReferenceType()
+        {
+            var expected = Result.Success(new Foo { Bar = "Result!" });
+            string json = "{\"Value\":{\"Bar\":\"Result!\"},\"Status\":0,\"IsSuccess\":true,\"SuccessMessage\":\"\",\"CorrelationId\":\"\",\"Errors\":[],\"ValidationErrors\":[]}";
+
+            var result = JsonSerializer.Deserialize<Result<Foo>>(json);
+
+            Assert.Equivalent(expected, result);
+        }
+
+        private class Foo
+        {
+            public string Bar { get; set; }
+        }
+    }
+}