Replace newtonsoft with system.text.json

Author: benrr101

src/Microsoft.Data.SqlClient/tests/tools/Microsoft.Data.SqlClient.TestUtilities/Config.cs

@@ -4,7 +4,7 @@
 
 using System;
 using System.IO;
-using Newtonsoft.Json;
+using System.Text.Json;
 
 #nullable enable
 
@@ -72,7 +72,7 @@ public static Config Load()
 
         public static void UpdateConfig(Config updatedConfig, string configPath = @"config.jsonc")
         {
-            string config = JsonConvert.SerializeObject(updatedConfig);
+            string config = JsonSerializer.Serialize(updatedConfig);
             File.WriteAllText(configPath, config);
         }
 
@@ -86,7 +86,7 @@ public static void UpdateConfig(Config updatedConfig, string configPath = @"conf
             try
             {
                 using StreamReader sr = new StreamReader(configPath);
-                return JsonConvert.DeserializeObject<Config>(sr.ReadToEnd()) ??
+                return JsonSerializer.Deserialize<Config>(sr.ReadToEnd()) ??
                        throw new InvalidOperationException($"Failed to deserialize config from '{configPath}'");
             }
             catch (FileNotFoundException)

src/Microsoft.Data.SqlClient/tests/tools/Microsoft.Data.SqlClient.TestUtilities/Microsoft.Data.SqlClient.TestUtilities.csproj

@@ -2,13 +2,17 @@
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
   </PropertyGroup>
+
+  <!-- Copy config file ================================================ -->
   <Target Name="CopyConfig" BeforeTargets="Compile">
     <Copy SourceFiles="config.default.jsonc" DestinationFiles="config.jsonc" Condition="!Exists('config.jsonc')" />
   </Target>
   <ItemGroup>
-    <None Update="config.jsonc">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </None>
-    <PackageReference Include="Newtonsoft.Json" />
+    <None Update="config.jsonc" CopyToOutputDirectory="PreserveNewest" />
+  </ItemGroup>
+
+  <!-- References ====================================================== -->
+  <ItemGroup>
+    <PackageReference Include="System.Text.Json" />
   </ItemGroup>
 </Project>