Add support for .NET 8.0 and conditional threading enhancements

- Update project to target both .NET 8.0 and .NET 9.0.
- Introduce conditional `Lock` and `object` usage based on framework version.
- Improve `README.md` with updated badges and links.
- Adjust NuGet dependency visibility with `PrivateAssets="All"`.

Author: 0x25CBFC4F

NullOpsDevs.LibSsh/Core/SshSession.cs

@@ -19,7 +19,12 @@ namespace NullOpsDevs.LibSsh.Core;
 public sealed class SshSession : IDisposable
 {
     private static bool libraryInitialized;
+    
+#if NET9_0_OR_GREATER
     private readonly Lock localLock = new();
+#else
+    private readonly object localLock = new();
+#endif
 
     private Socket? socket;
     private unsafe _LIBSSH2_SESSION* session;

NullOpsDevs.LibSsh/Interop/LibSsh2.cs

@@ -17,7 +17,11 @@ public static class LibSsh2
     /// <summary>
     /// Gets the global lock used for thread-safe library initialization.
     /// </summary>
+#if NET9_0_OR_GREATER
     public static readonly Lock GlobalLock = new();
+#else
+    public static readonly object GlobalLock = new();
+#endif
 
     /// <summary>
     /// Gets or sets the global logger action for libssh2 operations.

NullOpsDevs.LibSsh/NullOpsDevs.LibSsh.csproj

@@ -1,10 +1,11 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net9.0</TargetFramework>
+        <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
         <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+        <LangVersion>latest</LangVersion>
 
         <!-- NuGet Package Settings -->
         <PackageId>NullOpsDevs.LibSsh</PackageId>
@@ -78,11 +79,11 @@
         </Content>
     </ItemGroup>
     <ItemGroup>
-      <PackageReference Include="JetBrains.Annotations" Version="2025.2.2" />
+      <PackageReference Include="JetBrains.Annotations" Version="2025.2.2" PrivateAssets="All" />
     </ItemGroup>
 
     <ItemGroup>
-      <InternalsVisibleTo Include="NullOpsDevs.LibSsh.Test" />
+      <InternalsVisibleTo Include="NullOpsDevs.LibSsh.Test"  />
     </ItemGroup>
 
 </Project>

README.md

@@ -3,7 +3,8 @@
 A modern, cross-platform .NET library providing managed bindings for libssh2, enabling SSH operations including remote command execution, SCP file transfers, and advanced terminal (PTY) features.
 
 [![NuGet](https://img.shields.io/badge/nuget-1.0.0-blue.svg)](https://www.nuget.org/packages/NullOpsDevs.LibSsh/)
-[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
+[![.NET](https://img.shields.io/badge/.NET-8.0-purple.svg)](https://dotnet.microsoft.com/)
 [![.NET](https://img.shields.io/badge/.NET-9.0-purple.svg)](https://dotnet.microsoft.com/)
 
 ## Features