added .netstandard2.1 to supported .Net version of the Downloader

README.md

@@ -16,8 +16,9 @@
 
 :rocket: Fast, cross-platform and reliable multipart downloader with **.Net Core** supporting :rocket:
 
-Downloader is a modern, fluent, asynchronous, testable and portable library for .NET. This is a multipart downloader with asynchronous progress events.
-This library can be added to your `.Net 8` or later projects.
+**Downloader** is a modern, fluent, asynchronous, and portable library for .NET, designed with testability in mind. 
+It supports multipart downloads with real-time asynchronous progress events. 
+The library is compatible with projects targeting `.NET Standard 2.1`, `.NET 8`, and later versions.
 
 Downloader is running on Windows, Linux, and macOS.
 > Note: Support for old versions of `.NET` was removed from the Downloader `v3.2.0`. From this version onwards, `only .Net 8 and higher versions` will be supported.

src/Downloader.Test/IntegrationTests/ThrottledStreamTest.cs

@@ -39,7 +39,7 @@ public async Task TestReadStreamSpeed(int speedX, bool asAsync)
         while (readSize > 0)
         {
             readSize = asAsync
-                ? await stream.ReadAsync(buffer, 0, buffer.Length, new CancellationToken()).ConfigureAwait(false)
+                ? await stream.ReadAsync(buffer, 0, buffer.Length, new CancellationToken())
                 : stream.Read(buffer, 0, buffer.Length);
             totalReadSize += readSize;
 

src/Downloader/ConcurrentStream.cs

@@ -139,7 +139,8 @@ public ConcurrentStream(Stream stream, long maxMemoryBufferBytes = 0, ILogger lo
     /// <param name="initSize">The initial size of the file.</param>
     /// <param name="maxMemoryBufferBytes">The maximum amount of memory, in bytes, that the stream is allowed to allocate for buffering.</param>
     /// <param name="logger">The logger to use for logging.</param>
-    public ConcurrentStream(string filename, long initSize, long maxMemoryBufferBytes = 0, ILogger logger = null) : base(logger)
+    public ConcurrentStream(string filename, long initSize, long maxMemoryBufferBytes = 0, ILogger logger = null) :
+        base(logger)
     {
         _path = filename;
         _stream = new FileStream(filename, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.Read);
@@ -228,7 +229,8 @@ private async Task Watcher()
             StartState();
             while (!_watcherCancelSource.IsCancellationRequested)
             {
-                await _inputBuffer.WaitTryTakeAsync(_watcherCancelSource.Token, WritePacketOnFile).ConfigureAwait(false);
+                await _inputBuffer.WaitTryTakeAsync(_watcherCancelSource.Token, WritePacketOnFile)
+                    .ConfigureAwait(false);
             }
         }
         catch (Exception ex) when (ex is TaskCanceledException || ex is OperationCanceledException)
@@ -324,7 +326,11 @@ public async ValueTask DisposeAsync()
         if (!_disposed)
         {
             _disposed = true;
+#if NET8_0_OR_GREATER
             await _watcherCancelSource.CancelAsync().ConfigureAwait(false); // request the cancellation
+#else
+            _watcherCancelSource.Cancel(); // request the cancellation
+#endif
             await _stream.DisposeAsync().ConfigureAwait(false);
             _inputBuffer.Dispose();
         }

src/Downloader/Downloader.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net8.0;netstandard2.1;</TargetFrameworks>
     <LangVersion>latestMajor</LangVersion>
     <Version>3.2.0</Version>
     <AssemblyVersion>3.2.0</AssemblyVersion>