update target frameworks to include net9.0 and add specific package references; enhance README for clarity on ID generation features

Author: CarlTierney

ObjectIdentity/ObjectIdentity.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net6.0;netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0;net6.0;netstandard2.0</TargetFrameworks>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
     <PackageId>ObjectIdentity</PackageId>
@@ -35,6 +35,11 @@
     <DefineConstants>NET8_0</DefineConstants>
   </PropertyGroup>
 
+  <PropertyGroup Condition="'$(TargetFramework)' == 'net9.0'">
+    <DefineConstants>NET9_0</DefineConstants>
+  </PropertyGroup>
+
+
   <ItemGroup>
     <None Include="..\README.md" Pack="true" PackagePath="\" />
     <None Include="..\icon.png" Pack="true" PackagePath="\" Condition="Exists('..\icon.png')" />
@@ -75,4 +80,12 @@
     <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="9.0.4" />
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">
+        <PackageReference Include="Microsoft.Data.SqlClient" Version="6.0.2" />
+    <PackageReference Include="Microsoft.Extensions.Configuration" Version="8.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Options" Version="8.0.2" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.2" />
+    <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="9.0.4" />
+  </ItemGroup>
+
 </Project>

README.md

@@ -4,12 +4,13 @@
 [![NuGet Version](https://img.shields.io/nuget/v/ObjectIdentity.svg)](https://www.nuget.org/packages/ObjectIdentity/)
 [![NuGet Downloads](https://img.shields.io/nuget/dt/ObjectIdentity.svg)](https://www.nuget.org/packages/ObjectIdentity/)
 
-A library for generating unique IDs for objects prior to their being saved to the database with SQL Server backend support via sequences.
+A library for generating unique sequential IDs for objects across many servers and services prior to their being saved to the database.  An implementation exists using  a  SQL Server backend support via sequences, but the library is intended to be extensible to other potential back end soutions for identity.   
 
 ## Features
 
 - Thread-safe unique ID generation
 - SQL Server backend
+- Designed to support multiple instances of identity services without creating duplicate ids regardless of scale out
 - Extensible to support alternative stores for mechanisms via the IIdentityStore interface
 - Configurable ID ranges
 - Efficient batch allocation, allocation of block sizes can be handled via the scope initializer