Complete .net8 upgrade

Author: TimmyMC

Benchmarks/Schema.NET.Benchmarks/Schema.NET.Benchmarks.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup Label="Build">
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net8.0;net6.0;net462;net472;net48</TargetFrameworks>
+    <TargetFrameworks>net8.0;net48</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
   </PropertyGroup>
@@ -12,7 +12,7 @@
   </ItemGroup>
 
   <ItemGroup Label="Package References">
-    <PackageReference Include="BenchmarkDotNet" Version="0.13.12" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.15.6" />
   </ItemGroup>
 
 </Project>

Benchmarks/Schema.NET.Benchmarks/SchemaBenchmarkBase.cs

@@ -13,9 +13,6 @@ namespace Schema.NET.Benchmarks;
 [CsvMeasurementsExporter]
 [RPlotExporter]
 [SimpleJob(RuntimeMoniker.Net80)]
-[SimpleJob(RuntimeMoniker.Net60)]
-[SimpleJob(RuntimeMoniker.Net462)]
-[SimpleJob(RuntimeMoniker.Net472)]
 [SimpleJob(RuntimeMoniker.Net48)]
 public abstract class SchemaBenchmarkBase
 {

Benchmarks/Schema.NET.Benchmarks/packages.lock.json

@@ -13,7 +13,7 @@ public class ContextJsonConverter : JsonConverter<JsonLdContext>
     /// <inheritdoc />
     public override JsonLdContext Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
     {
-#if NET6_0_OR_GREATER
+#if NET
         ArgumentNullException.ThrowIfNull(typeToConvert);
         ArgumentNullException.ThrowIfNull(options);
 #else
@@ -82,7 +82,7 @@ public override JsonLdContext Read(ref Utf8JsonReader reader, Type typeToConvert
     /// <inheritdoc />
     public override void Write(Utf8JsonWriter writer, JsonLdContext value, JsonSerializerOptions options)
     {
-#if NET6_0_OR_GREATER
+#if NET
         ArgumentNullException.ThrowIfNull(writer);
         ArgumentNullException.ThrowIfNull(value);
         ArgumentNullException.ThrowIfNull(options);

Source/Common/ContextJsonConverter.cs

@@ -23,7 +23,7 @@ public class DateTimeToIso8601DateValuesJsonConverter : ValuesJsonConverter
     /// <param name="options">The JSON serializer options.</param>
     public override void WriteObject(Utf8JsonWriter writer, object? value, JsonSerializerOptions options)
     {
-#if NET6_0_OR_GREATER
+#if NET
         ArgumentNullException.ThrowIfNull(writer);
         ArgumentNullException.ThrowIfNull(options);
 #else

Source/Common/DateTimeToIso8601DateValuesJsonConverter.cs

@@ -23,7 +23,7 @@ public static bool TryParse(
         [NotNullWhen(true)]
 #endif
         string? value,
-#if NET6_0_OR_GREATER
+#if NET
         out object? result) =>
         Enum.TryParse(enumType, value, out result);
 #else
@@ -59,7 +59,7 @@ public static bool TryParseEnumFromSchemaUri(
         string? value,
         out object? result)
     {
-#if NET6_0_OR_GREATER
+#if NET
         ArgumentNullException.ThrowIfNull(enumType);
 #else
         if (enumType is null)

Source/Common/EnumHelper.cs

@@ -30,7 +30,7 @@ public OneOrMany(T? item)
         }
         else
         {
-            this.collection = new[] { item };
+            this.collection = [item];
             this.HasOne = true;
         }
     }

Source/Common/OneOrMany{T}.cs

@@ -41,7 +41,7 @@ public SchemaEnumJsonConverter()
     /// <returns>The enumeration value.</returns>
     public override T Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
     {
-#if NET6_0_OR_GREATER
+#if NET
         ArgumentNullException.ThrowIfNull(typeToConvert);
 #else
         if (typeToConvert is null)
@@ -67,7 +67,7 @@ public override T Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerial
     /// <param name="options">The JSON serializer options.</param>
     public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
     {
-#if NET6_0_OR_GREATER
+#if NET
         ArgumentNullException.ThrowIfNull(writer);
         ArgumentNullException.ThrowIfNull(options);
 #else

Source/Common/SchemaEnumJsonConverter{T}.cs

@@ -21,7 +21,7 @@ public class TimeSpanToISO8601DurationValuesJsonConverter : ValuesJsonConverter
     /// <param name="options">The JSON serializer options.</param>
     public override void WriteObject(Utf8JsonWriter writer, object? value, JsonSerializerOptions options)
     {
-#if NET6_0_OR_GREATER
+#if NET
         ArgumentNullException.ThrowIfNull(writer);
         ArgumentNullException.ThrowIfNull(options);
 #else

Source/Common/TimeSpanToISO8601DurationValuesJsonConverter.cs

@@ -42,7 +42,7 @@ static ValuesJsonConverter()
     /// <returns>The object value.</returns>
     public override IValues? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
     {
-#if NET6_0_OR_GREATER
+#if NET
         ArgumentNullException.ThrowIfNull(typeToConvert);
         ArgumentNullException.ThrowIfNull(options);
 #else
@@ -100,7 +100,7 @@ static ValuesJsonConverter()
     /// <param name="options">The JSON serializer options.</param>
     public override void Write(Utf8JsonWriter writer, IValues value, JsonSerializerOptions options)
     {
-#if NET6_0_OR_GREATER
+#if NET
         ArgumentNullException.ThrowIfNull(writer);
         ArgumentNullException.ThrowIfNull(value);
         ArgumentNullException.ThrowIfNull(options);
@@ -146,7 +146,7 @@ public override void Write(Utf8JsonWriter writer, IValues value, JsonSerializerO
     /// <param name="options">The JSON serializer options.</param>
     public virtual void WriteObject(Utf8JsonWriter writer, object? value, JsonSerializerOptions options)
     {
-#if NET6_0_OR_GREATER
+#if NET
         ArgumentNullException.ThrowIfNull(writer);
         ArgumentNullException.ThrowIfNull(options);
 #else