Microsoft.Bcl.Memory 10.0.9

Prefix Reserved
.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.6.2 This package targets .NET Framework 4.6.2. The package is compatible with this framework or higher.
There is a newer prerelease version of this package available.
See the version list below for details. 
dotnet add package Microsoft.Bcl.Memory --version 10.0.9
                    


                    

                
NuGet\Install-Package Microsoft.Bcl.Memory -Version 10.0.9
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Microsoft.Bcl.Memory" Version="10.0.9" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Microsoft.Bcl.Memory" Version="10.0.9" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Microsoft.Bcl.Memory" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Microsoft.Bcl.Memory --version 10.0.9
                    


                    

                
#r "nuget: Microsoft.Bcl.Memory, 10.0.9"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Microsoft.Bcl.Memory@10.0.9
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Microsoft.Bcl.Memory&version=10.0.9
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Microsoft.Bcl.Memory&version=10.0.9
                    


                            Install as a Cake Tool

About

Provides Index and Range types to simplify slicing operations on collections for .NET Framework and .NET Standard 2.0. Provides Base64Url for encoding data in a URL-safe manner on older .NET platforms. Provides Utf8 for converting chunked data between UTF-8 and UTF-16 encodings on .NET Framework and .NET Standard 2.0.

This library is not necessary nor recommended when targeting versions of .NET that include the relevant support.

Key Features

  • Enables the use of Index and Range types on .NET Framework and .NET Standard 2.0.
  • Provides Base64Url encoding, decoding, and validation for URL-safe data processing on older .NET platforms.
  • Provides Utf8 encoding, decoding, and validation for chunked data between UTF-8 and UTF-16 on .NET Framework and .NET Standard 2.0.

How to Use

The Index and Range types simplify working with slices of arrays, strings, or other collections.

string[] words = ["The", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"];

// Use Index to reference the last element
Console.WriteLine(words[^1]);
// Output: "dog"

// Use Range to reference a slice
string[] phrase = words[1..4];
Console.WriteLine(string.Join(" ", phrase));
// Output: "quick brown fox"

Base64Url encoding is a URL-safe version of Base64, commonly used in web applications, such as JWT tokens.

using System.Buffers.Text;
using System.Text;

// Original data
byte[] data = Encoding.UTF8.GetBytes("Hello World!");

Span<byte> encoded = new byte[Base64Url.GetEncodedLength(data.Length)];
Base64Url.EncodeToUtf8(data, encoded, out int _, out int bytesWritten);

string encodedString = Base64Url.EncodeToString(data);  
Console.WriteLine($"Encoded: {encodedString}");
// Encoded: SGVsbG8gV29ybGQh

Span<byte> decoded = new byte[data.Length];
Base64Url.DecodeFromUtf8(encoded[..bytesWritten], decoded, out _, out bytesWritten);

string decodedString = Encoding.UTF8.GetString(decoded[..bytesWritten]);
Console.WriteLine($"Decoded: {decodedString}");
// Decoded: Hello World!

Main Types

The main types provided by this library are:

  • System.Index
  • System.Range
  • System.Buffers.Text.Base64Url
  • System.Text.Unicode.Utf8

Additional Documentation

API documentation

Feedback & Contributing

Microsoft.Bcl.Memory is released as open source under the MIT license. Bug reports and contributions are welcome at the GitHub repository.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 is compatible. 
.NET Framework net461 was computed.  net462 is compatible.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

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Version Downloads Last Updated
11.0.0-preview.5.26302.115 157 6/9/2026
11.0.0-preview.4.26230.115 5,287 5/12/2026
11.0.0-preview.3.26207.106 780 4/14/2026
11.0.0-preview.2.26159.112 848 3/10/2026
11.0.0-preview.1.26104.118 506 2/10/2026
10.0.9 26,147 6/9/2026
10.0.8 246,032 5/12/2026
10.0.7 338,484 4/21/2026
10.0.6 185,609 4/14/2026
10.0.5 1,334,775 3/12/2026
10.0.4 1,576,608 3/10/2026
10.0.3 118,874 2/10/2026 10.0.3 has at least one vulnerability with high severity.
10.0.2 298,320 1/13/2026 10.0.2 has at least one vulnerability with high severity.
10.0.1 202,107 12/9/2025 10.0.1 has at least one vulnerability with high severity.
9.0.17 2,275 6/9/2026
9.0.16 48,953 5/12/2026
9.0.15 95,088 4/14/2026
9.0.14 1,380,021 3/10/2026
9.0.13 5,386 2/10/2026 9.0.13 has at least one vulnerability with high severity.
9.0.12 11,974 1/13/2026 9.0.12 has at least one vulnerability with high severity.
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