Update to .NET 10.0 and C# 14 (#223)

Author: Copilot

Directory.Build.props

@@ -16,7 +16,7 @@
 	<PackageReadmeFile>README.md</PackageReadmeFile>
   </PropertyGroup>
   <PropertyGroup>
-  	<LangVersion>12.0</LangVersion>
+  	<LangVersion>14.0</LangVersion>
   	<ImplicitUsings>true</ImplicitUsings>
   	<Nullable>enable</Nullable>
   </PropertyGroup>

ListingManager.Tests/EssentialCSharp.ListingManager.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net9.0</TargetFramework>
+        <TargetFramework>net10.0</TargetFramework>
         <IsPackable>false</IsPackable>
     </PropertyGroup>
 

ListingManager/EssentialCSharp.ListingManager.csproj

@@ -2,7 +2,7 @@
 
 	<PropertyGroup>
 		<OutputType>Exe</OutputType>
-		<TargetFramework>net9.0</TargetFramework>
+		<TargetFramework>net10.0</TargetFramework>
 		<PackAsTool>true</PackAsTool>
 		<ToolCommandName>ListingManager</ToolCommandName>
 		<RepositoryType>git</RepositoryType>

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "9.0.100",
+    "version": "10.0.100",
     "rollForward": "latestMinor"
   }
 }